Sickness Idioms: 15 Common Illness Idioms & Meanings

Quick Answer

The fastest way to understand English sickness idioms.

A sickness idiom is a figurative phrase that expresses illness, recovery, or physical condition. For example, when someone says they are "under the weather," they are feeling unwell, not literally standing underneath the rain.

Native English speakers use sickness idioms constantly—in the office, at school, and in casual conversations. Below, you will find a massive grid of illness idioms categorized by theme, followed by deep dives into the most popular ones, complete with origins, examples, and usage tips.

What is a Sickness Idiom?

A linguistic breakdown of health-related figurative language.

Concept	Figurative Health Phrase
Key Trait	The meaning is tied to physical states (fevers, fainting) but isn't literal.
Usage	Informal and conversational. Used to describe illness and recovery colorfully.
Example	"Sick as a dog" (Very ill) vs. "Sick as a physician" (Literal comparison).
Translation	Rarely literal when translated

The Sickness Idioms Grid

A complete visual directory of English illness idioms. Click any phrase to explore its definition.

Common Illness Idioms

Symptoms & Pain Idioms

Recovery & Healing Idioms

Exhaustion & Burnout Idioms

Severe Conditions & Death Idioms

Unconsciousness & Fainting Idioms

Stomach & Digestive Idioms

Mental & Nervous Health Idioms

Common Illness Idioms

Under the Weather Sick as a Dog Catch a Bug Feel Run Down Out of Sorts In Bad Shape Pale as a Ghost Green Around the Gills Queasy Cotton-Mouth Run a Fever Burning Up Sweating Bullets Shivering Bedridden

Symptoms & Pain Idioms

Splitting Headache Frog in Your Throat Stomach in Knots Seeing Stars Ringing in the Ears Achy Breaky Stuffed Up Watering Eyes Dizzy Spell Short of Breath Pounding Head Throbbing Pain Stiff Neck Tickle in the Throat Bellyache

Recovery & Healing Idioms

On the Mend Back on Your Feet Turn the Corner Clean Bill of Health Fit as a Fiddle Right as Rain Picture of Health Spring in Your Step Full of Life Bouncing Back Out of the Woods On the Road to Recovery Fresh as a Daisy Alive and Kicking Strong as an Ox

Exhaustion & Burnout Idioms

Burn the Candle at Both Ends Run Ragged Dead on Your Feet Worn to a Frazzle Burned Out Bone-Tired Exhausted Running on Empty Out of Steam Dead Tired Sleep Deprivation Dozing Off Ready to Drop Fatigued Drained

Severe Conditions & Death Idioms

At Death's Door One Foot in the Grave Touch and Go Critical Condition Slipping Away Life Support Hanging by a Thread On Borrowed Time At the Brink Grave Condition Terminal Fading Fast Pulse Weakening Flatline Code Blue

Unconsciousness & Fainting Idioms

Out Cold Pass Out Black Out Faint Dead Away Seeing Stars Go Limp Collapse Lose Consciousness Keel Over Drop Like a Fly Slip into a Coma Lights Out Conk Out Fall into a Deep Sleep Nod Off

Stomach & Digestive Idioms

Lose Your Lunch Toss Your Cookies Upchuck Throw Up Nauseous Motion Sickness Butterflies in My Stomach Sick to Your Stomach Bad Stomach Heartburn Indigestion Bellyache Upset Stomach Bile Gag Reflex

Mental & Nervous Health Idioms

Nervous Wreck Anxious Depressed Feeling Blue Stressed Out Tense On Edge Mental Breakdown Burnout Frazzled Overwhelmed Paranoid Delirious Hallucinating Disoriented

Top 50 Sickness Idiom Deep Dives

Meanings, origins, and examples of the most used everyday sickness idioms.

Under the Weather

Feeling mildly ill or unwell.

Origin: 19th-century maritime term; sailors who were seasick were sent below deck to get out of the harsh weather.

I'm feeling under the weather today, so I'll stay home.
She looked under the weather at the party.
He can't come to work; he's a bit under the weather.

Sick as a Dog

To be very ill, often involving vomiting.

Origin: 16th-century; dogs were known to eat anything and frequently get sick.

After eating the bad seafood, I was sick as a dog.
He caught the flu and was sick as a dog all weekend.
She felt sick as a dog after the rollercoaster.

On the Mend

Recovering from an illness or injury.

Origin: 14th-century; 'mend' meaning to repair or fix.

My grandfather is on the mend after his surgery.
I'm finally on the mend from that terrible cold.
The doctor says she is on the mend.

Back on Your Feet

To have recovered from an illness and be healthy again.

Origin: Literal recovery from being bedridden to standing and walking.

I'll be back on my feet in a few days.
The business is finally back on its feet.
It took a month to get back on my feet.

Fit as a Fiddle

In excellent physical condition.

Origin: 16th-century; 'fit' meant suitable, and 'fiddle' meant perfect (like a well-tuned instrument).

My grandmother is 80 and fit as a fiddle.
I feel fit as a fiddle after my vacation.
The doctor said I'm as fit as a fiddle.

Catch a Bug

To get a mild infectious illness, like a cold or virus.

Origin: 19th-century; 'bug' was slang for a germ or microbe before germs were fully understood.

I caught a bug and have a sore throat.
There's a nasty bug going around the office.
She caught a stomach bug.

Frog in Your Throat

A hoarse voice caused by a sore throat or phlegm.

Origin: 19th-century medicine; doctors used to put a live frog in a patient's throat to cure whooping cough.

I have a frog in my throat today.
Excuse my frog in the throat, I have a cold.
He sounded like he had a frog in his throat.

Splitting Headache

A very severe and painful headache.

Origin: 17th-century; the pain feels as if the head is splitting open.

I have a splitting headache from staring at the screen.
The loud noise gave me a splitting headache.
She went to bed early with a splitting headache.

Out Cold

Deeply unconscious, often from illness, injury, or anesthesia.

Origin: Early 20th-century; being entirely unresponsive to the outside world.

He took painkillers and was out cold.
After the accident, she was out cold for hours.
I was out cold during the entire procedure.

Feel Run Down

Feeling tired, weak, and slightly unwell due to overwork.

Origin: 19th-century; like a clock or machine that needs winding.

I've been feeling run down lately.
You look run down; you should rest.
Working 60 hours a week leaves me feeling run down.

At Death's Door

To be so ill or injured that one might die.

Origin: 16th-century; metaphorically standing at the threshold of the afterlife.

He was at death's door before the transplant.
The flu made her feel like she was at death's door.
The patient was at death's door, but the doctors saved him.

One Foot in the Grave

To be very old, ill, or close to death.

Origin: 16th-century; metaphorically already stepping into the grave.

He looks like he has one foot in the grave.
I felt like I had one foot in the grave with that flu.
She's 90 but acts like she doesn't have one foot in the grave.

Lose Your Lunch

To vomit.

Origin: 20th-century slang; losing the food you just ate.

The rough waves made him lose his lunch.
I felt so dizzy I thought I'd lose my lunch.
The rollercoaster almost made me lose my lunch.

Pale as a Ghost

Having extremely pale skin, usually due to shock, fear, or illness.

Origin: 16th-century; comparing a sickly white complexion to the mythical spirit.

She walked out of the doctor's office pale as a ghost.
After giving blood, he was pale as a ghost.
The sudden illness left her pale as a ghost.

In Bad Shape

To be in poor physical condition or severely injured.

Origin: 20th-century; 'shape' referring to the physical state of the body.

After the car accident, he was in pretty bad shape.
If you don't take your medicine, you'll be in bad shape.
The athlete was in bad shape after the injury.

Green Around the Gills

Looking nauseated or sickly pale.

Origin: 19th-century; 'gills' referring to the face, and green indicating nausea.

After the boat ride, he looked green around the gills.
She turned green around the gills at the sight of blood.
I feel a bit green around the gills today.

Right as Rain

Perfectly healthy and well.

Origin: 19th-century British; rain being considered clean and beneficial.

After a good night's sleep, I'll be right as rain.
The medicine made her right as rain.
Don't worry about him; he'll be right as rain.

Picture of Health

A perfect example of good health.

Origin: 19th-century; looking as healthy as a portrait of an ideal person.

She eats well and exercises; she's the picture of health.
He looked the picture of health at the reunion.
The baby is the picture of health.

Out of Sorts

Feeling slightly unwell or in a bad mood.

Origin: 15th-century printing; letters (sorts) were out of order, causing frustration.

I've been feeling out of sorts all day.
She's a bit out of sorts today; give her space.
Lack of sleep leaves me feeling out of sorts.

Toss Your Cookies

To vomit.

Origin: 20th-century American slang; tossing (throwing) cookies (food).

The turbulence made him toss his cookies.
I thought I was going to toss my cookies.
She tossed her cookies right after dinner.

Bedridden

Confined to bed due to illness.

Origin: Old English; 'ridden' meaning ruled or overcome by something.

She was bedridden for a week with the flu.
The injury left him bedridden.
My grandmother has been bedridden for months.

Run a Fever

To have a higher than normal body temperature.

Origin: 17th-century; 'run' meaning to progress or continue.

The baby is running a fever.
I went home because I was running a fever.
Are you still running a fever?

Burning Up

To have a very high fever; feeling extremely hot.

Origin: 19th-century; comparing the heat of a fever to being on fire.

I'm burning up; check my temperature.
She was burning up all night.
He is burning up with a fever.

Clean Bill of Health

An official declaration that a person is healthy.

Origin: 19th-century maritime law; a certificate proving a ship had no disease.

The doctor gave me a clean bill of health.
She went to the hospital and got a clean bill of health.
I hope to get a clean bill of health tomorrow.

Turn the Corner

To pass the worst part of an illness and begin to recover.

Origin: 19th-century; turning a corner to get out of a bad situation.

The patient turned the corner last night.
I think I'm finally turning the corner with this cold.
The fever broke, so we've turned the corner.

Out of the Woods

To be past the most dangerous part of a medical crisis.

Origin: 18th-century; escaping the danger and darkness of a deep forest.

She is out of the woods and recovering well.
The surgery was a success; he's out of the woods.
We won't know if he's out of the woods until tomorrow.

Touch and Go

A situation where the outcome is uncertain, especially in a medical crisis.

Origin: 19th-century; a risky maneuver where contact is brief and uncertain.

It was touch and go for a while after the surgery.
The first 24 hours will be touch and go.
His condition is touch and go.

Hang by a Thread

To be in a highly precarious or critical state.

Origin: 16th-century; the thin string of life breaking easily.

His life hung by a thread in the ICU.
The patient is hanging by a thread.
For a moment, it hung by a thread.

Kick the Bucket

To die.

Origin: 16th-century; a theory about animals hanging from a beam (bucket) before slaughter.

He kicked the bucket at the age of 90.
I want to travel before I kick the bucket.
The old car finally kicked the bucket.

Pushing Up Daisies

To be dead and buried.

Origin: 20th-century; being buried in the ground where daisies grow above.

He'll be pushing up daisies if he doesn't stop smoking.
I'll be pushing up daisies before this project is done.
Her old cat is pushing up daisies.

Pass Away

A polite euphemism for dying.

Origin: 14th-century; the soul 'passing' to the afterlife.

Her grandfather passed away last night.
He passed away peacefully in his sleep.
The actor passed away at 80.

Bite the Dust

To die, fail, or break down.

Origin: 19th-century; soldiers falling face-first into the dirt in battle.

Another old phone bites the dust.
The villain bit the dust in the final scene.
My laptop finally bit the dust.

Flatline

To die; derived from the heart monitor showing a flat line.

Origin: Late 20th-century medical terminology.

The patient flatlined for two minutes.
His heart flatlined, but they revived him.
The project flatlined after the budget cut.

Keel Over

To suddenly collapse or fall over, often from illness.

Origin: 19th-century nautical; a ship rolling completely over on its side (keel).

He took one sip and keeled over.
I thought I was going to keel over from the heat.
The old man keeled over in the garden.

Drop Like Flies

To rapidly collapse, become ill, or die in large numbers.

Origin: 20th-century; insects falling dead in swarms.

People are dropping like flies from the flu this year.
The marathon runners dropped like flies in the heat.
The soldiers dropped like flies.

Spring in Your Step

Walking with energetic, healthy enthusiasm.

Origin: 20th-century; the physical bounce of a healthy, energetic person.

You have a spring in your step today!
The new medicine gave him a spring in his step.
She walked with a spring in her step.

Fresh as a Daisy

Feeling completely rested, healthy, and energetic.

Origin: 19th-century; daisies opening fresh and bright in the morning.

After a good sleep, I feel fresh as a daisy.
She looked fresh as a daisy at the meeting.
He woke up fresh as a daisy.

Alive and Kicking

Active and in good health, despite rumors otherwise.

Origin: 18th-century; referring to a lively baby kicking in the womb or a fish out of water.

I'm still alive and kicking!
The rumor of his retirement is false; he's alive and kicking.
The old tradition is still alive and kicking.

Strong as an Ox

Having great physical strength and health.

Origin: 19th-century; comparing human strength to a draft animal.

He eats well and is strong as an ox.
She doesn't need help; she's strong as an ox.
My grandfather is strong as an ox.

Run Ragged

To be exhausted from overwork or stress.

Origin: 19th-century; being torn or worn into strips.

The kids have run me ragged today.
I've been run ragged at work this week.
The illness left him run ragged.

Dead on Your Feet

Completely exhausted but still standing.

Origin: 20th-century; functioning like a zombie.

After the double shift, I was dead on my feet.
He worked until he was dead on his feet.
I'm dead on my feet and need sleep.

Running on Empty

Operating with no energy or resources left.

Origin: Late 20th-century; a car running on an empty gas tank.

I haven't eaten; I'm running on empty.
She's running on empty after the long flight.
If I don't get a day off, I'll be running on empty.

Nervous Wreck

A person who is extremely anxious and stressed, affecting health.

Origin: 19th-century; 'wreck' referring to a destroyed ship.

The waiting made her a nervous wreck.
I was a nervous wreck before the surgery.
He is a nervous wreck during thunderstorms.

Bundle of Nerves

A highly anxious or tense person.

Origin: 20th-century; a 'bundle' implying tightly wound tension.

She's a bundle of nerves before the test.
I was a bundle of nerves in the waiting room.
The diagnosis made him a bundle of nerves.

Stomach in Knots

Feeling physically ill from anxiety or nervousness.

Origin: 20th-century; the intestines twisting from stress.

My stomach is in knots before the presentation.
The bad news tied my stomach in knots.
She had stomach in knots all day.

Butterflies in My Stomach

A fluttery, slightly nauseous feeling caused by nervousness.

Origin: 20th-century; the physical sensation of fluttering in the gut.

I get butterflies in my stomach before flying.
He had butterflies in his stomach before the game.
Speaking in public gives me butterflies in my stomach.

Sick to Your Stomach

Feeling nauseated, either physically or from disgust.

Origin: 18th-century; the physical reaction of the stomach to illness or strong emotion.

The graphic movie made me sick to my stomach.
The rollercoaster made her sick to her stomach.
The lie made him sick to his stomach.

Burn the Candle at Both Ends

To exhaust oneself by doing too much, leading to illness.

Origin: 18th-century; using up resources twice as fast, leaving no rest.

You can't burn the candle at both ends forever.
She burned the candle at both ends and got sick.
I'm burning the candle at both ends with two jobs.

Worn to a Frazzle

Completely exhausted and stressed out.

Origin: 19th-century; 'frazzle' meaning frayed edges of fabric.

The kids have me worn to a frazzle.
I'm worn to a frazzle after that road trip.
He was worn to a frazzle by the end of the semester.

Conk Out

To fall asleep quickly from exhaustion or to stop functioning.

Origin: Early 20th-century; onomatopoeic sound of an engine stopping or a hit to the head.

I conked out on the couch at 8 PM.
The old machine finally conked out.
She conked out from the cold medicine.

50 Example Sentences

See how idioms function in original sentences across 5 contexts. The idiom is highlighted for easy learning.

Work & Office

I'm feeling a bit under the weather, so I'm going to take a sick day.
There's a nasty bug going around the office, and half the team is out sick.
He worked 80 hours a week and burned the candle at both ends until he collapsed.
After a week of the flu, she is finally on the mend.
I've been feeling run down lately, so I'm starting to take vitamins.
The doctor gave him a clean bill of health after his annual physical.
By Friday evening, I was dead on my feet from the trade show.
She was a nervous wreck before her big presentation to the board.
He came back to work looking fresh as a daisy after his vacation.
If we don't hire more staff, we're all going to be run ragged.

School & Learning

I couldn't focus on the exam because I had a splitting headache.
The student excused his hoarse voice, saying he had a frog in his throat.
She was pale as a ghost after giving blood at the school drive.
I had butterflies in my stomach before my college entrance interview.
After pulling three all-nighters, he was completely worn to a frazzle.
I need to go to the nurse; my stomach is in knots from the stress.
He stayed home from school because he was sick as a dog.
Don't worry about the math test; you'll be right as rain once you start.
The sudden fainting spell left her completely out cold on the gym floor.
I drank too much coffee on an empty stomach and now I feel sick to my stomach.

Relationships & Social

My partner waited on me hand and foot while I was bedridden with the flu.
She was a bundle of nerves waiting for her biopsy results.
After the rough boat ride, he looked green around the gills.
We had to cancel our anniversary dinner because I caught a stomach bug.
He looked like he had one foot in the grave when he walked in with that terrible cough.
I was so relieved when the doctor said she was out of the woods.
He was in bad shape after the car accident, but his spirits are high.
She took care of me when I was tossing my cookies all night.
After the scary fever broke, we knew he had turned the corner.
Even at 85, my grandfather is alive and kicking and travels twice a year.

Daily Life & Home

The baby is running a fever, so I'm taking her temperature every hour.
I took some NyQuil and was out cold for ten hours straight.
After the stomach flu, it took me a week to get back on my feet.
I've been feeling out of sorts all day; I think I need an early night.
My grandfather's old dog finally kicked the bucket last night.
She is the picture of health now that she's eating organic and doing yoga.
I woke up feeling fresh as a daisy after eight hours of sleep.
I'm burning up; can you check if the thermostat is broken?
I was so carsick on the winding roads I thought I would lose my lunch.
My grandfather is 90, but he's still strong as an ox.

Travel & Outdoors

The turbulence was so bad that half the passengers lost their lunch.
After the 15-hour flight, I was completely dead on my feet.
I caught a weird bug while traveling in South America.
The heat was so intense that I felt like I was going to keel over.
I was a nervous wreck during the turbulent landing.
Despite the long hike, she returned looking fit as a fiddle.
The motion of the boat left him looking green around the gills.
I haven't eaten since breakfast; I'm literally running on empty.
The exotic food looked great, but it made me sick to my stomach.
We walked so much in Rome that my legs felt like they were going to drop off.

Everyday Usage

How native speakers use sickness idioms in casual, daily life.

In daily conversation, sickness idioms are used to describe feeling unwell without getting too graphic. Instead of saying "I am vomiting," a native speaker might say "I'm tossing my cookies." It makes discussing health less awkward.

"I can't make it to dinner; I think I caught a bug."
"I was sick as a dog all night after eating those tacos."
"I'm just going to sleep; I feel a bit under the weather."
"My throat is hoarse; I've got a frog in my throat."
"After a weekend of rest, I'll be right as rain."

Academic Usage

How to use sickness idioms in essays and research.

In academic writing, sickness idioms are generally discouraged when describing medical conditions, as they lack precision. However, they are frequently used in historical or literary analysis to describe societal 'ills' or the emotional state of characters.

"The protagonist's mind was a bundle of nerves throughout the novel."
"The economy was on its death's door during the Great Depression."
"The society was sick to its stomach with corruption."
"The treaty provided a clean bill of health for the recovering nation."
"The cultural movement was a sign that the nation was on the mend."

Professional Usage

How to use sickness idioms in business and corporate settings.

In the workplace, sickness idioms are common in HR discussions or emails calling in sick. Phrases like 'under the weather' are polite and professional ways to excuse yourself without sharing unwanted medical details.

"I will be working from home today as I am feeling under the weather."
"The team is a bit run down after the product launch."
"Let's make sure we don't burn the candle at both ends this quarter."
"He is on the mend and will return to the office Monday."
"The doctor gave her a clean bill of health, so she can resume travel."

Real-Life Conversations

How native speakers use sickness idioms in common scenarios.

🏫 School

Student: I have a [splitting headache] and can't focus.

Teacher: Go to the nurse. You look [pale as a ghost].

🎓 College

Roommate 1: Are you okay? You look [green around the gills].

Roommate 2: I think I ate something bad; I might [toss my cookies].

🏢 Office

Colleague 1: You look [run down] today.

Colleague 2: Yeah, I've been [burning the candle at both ends].

💼 Business Meeting

Manager: John is out with a [stomach bug].

Employee: Hope he gets [back on his feet] soon.

🤝 Job Interview

Candidate: I had [butterflies in my stomach] before this interview.

Interviewer: Don't worry; you're doing great. You'll be [right as rain].

🍽️ Restaurant

Friend 1: This seafood tastes funny.

Friend 2: Don't eat it, or you'll be [sick as a dog] later.

🛍️ Pharmacy

Shopper: I'm feeling [under the weather].

Cashier: Take this syrup; it will help you get [back on your feet].

✈️ Travel

Traveler: The turbulence made me [sick to my stomach].

Agent: Here is a bag, just in case you [lose your lunch].

🚗 Driving

Driver: I'm so tired I might [conk out] at the wheel.

Passenger: Pull over; you're [dead on your feet].

👨‍👩‍👧‍👦 Family

Mom: The baby is [running a fever].

Dad: Let's call the doctor; I'm a [nervous wreck].

🎉 Friends

Friend 1: After the ride, she was [pale as a ghost].

Friend 2: Yeah, she usually gets [butterflies in her stomach] on coasters.

💌 Dating

Guy: I can't go out tonight; I [caught a bug].

Friend: Get some rest, so you're [fit as a fiddle] for the next date.

🏥 Healthcare

Patient: I feel like I'm at [death's door].

Doctor: It's just the flu. You'll be [on the mend] in a few days.

🏠 Home

Wife: I'm [burning up]; check my temperature.

Husband: You're definitely running a fever. Go to bed.

Common Mistakes

Avoid these frequent sickness idiom pitfalls.

Saying "sick as a doc".

✓ Say "sick as a dog."

Explanation: The idiom compares extreme illness to a sick dog, not a doctor ('doc').

Tip: Think of a dog eating something bad and getting sick.

Writing "under the whether".

✓ Write "under the weather."

Explanation: "Whether" is a conjunction. "Weather" refers to the climate, which is correct for this idiom.

Tip: Sailors went below deck to escape the harsh weather.

Saying "frog in my lung".

✓ Say "frog in your throat."

Explanation: A hoarse voice is caused by throat irritation, not the lungs, hence the 'frog' is in the throat.

Tip: The croaking sound mimics a frog in the throat.

Saying "back on my foot".

✓ Say "back on your feet."

Explanation: You stand on both feet when you recover, not just one foot.

Tip: Recovery means standing up on two feet again.

Saying "fit as a violin".

✓ Say "fit as a fiddle."

Explanation: The idiom uses 'fiddle' (a violin) because of the alliteration with 'fit'.

Tip: Remember the 'f' sound: Fit as a Fiddle.

Saying "splitting headache" to mean a minor ache.

✓ Use "splitting headache" for severe pain.

Explanation: A 'splitting' headache is intensely painful, as if your head is splitting open. It is not a mild discomfort.

Tip: Reserve 'splitting' for extreme, throbbing pain.

Spelling it "clean bill of health" as "clean bill of wealth".

✓ Write "clean bill of health."

Explanation: The idiom refers to a medical certificate proving someone is healthy. 'Wealth' is unrelated.

Tip: Think of a doctor's bill declaring your health.

Mixing up "toss your cookies" with "toss your salad".

✓ Say "toss your cookies" for vomiting.

Explanation: "Toss your cookies" means to vomit. "Toss a salad" is a culinary term. Mixing them up is embarrassing.

Tip: Cookies represent food you have eaten; tossing it means vomiting.

Saying "kick the bucket" to mean leaving a place.

✓ Understand that "kick the bucket" means to die.

Explanation: It is a slang euphemism for death. It does not mean leaving a party or quitting a job.

Tip: Use it carefully; it refers to dying, often suddenly.

Saying "green in the gills".

✓ Say "green around the gills."

Explanation: The correct preposition is 'around'. 'Gills' refers to the sides of the face/jaw, like a fish.

Tip: Think of nausea making the area around the jaw look green.

Correct vs. Incorrect Examples

Contextual usage comparisons.

Incorrect

I am under the whether today.

Correct

I am under the weather today.

Why: "Weather" is the correct spelling, referring to the climate conditions sailors avoided.

Incorrect

He was sick as a doc after the meal.

Correct

He was sick as a dog after the meal.

Why: The idiom compares severe illness to a sick dog, not a doctor.

Incorrect

My grandfather is as fit as a violin.

Correct

My grandfather is as fit as a fiddle.

Why: While a fiddle is a violin, the idiom strictly uses the word 'fiddle' for alliteration.

Incorrect

I can't speak; I have a frog in my lung.

Correct

I can't speak; I have a frog in my throat.

Why: A hoarse voice is caused by throat issues, so the frog is in the throat, not the lung.

Incorrect

She tossed her salad when she got sick.

Correct

She tossed her cookies when she got sick.

Why: "Toss your cookies" is the idiom for vomiting. "Toss a salad" is literal cooking.

Incorrect

He is back on his foot after the surgery.

Correct

He is back on his feet after the surgery.

Why: Recovery involves standing up on both feet, not just one foot.

Incorrect

The doctor gave him a clean bill of wealth.

Correct

The doctor gave him a clean bill of health.

Why: The certificate declares a person's health status, not their wealth.

Incorrect

I feel a bit under the weather, so I will go to the party.

Correct

I feel a bit under the weather, so I will stay home.

Why: Feeling under the weather means feeling sick, so staying home is the logical action, not attending a party.

Incorrect

The old machine is on the mend.

Correct

The old machine is dead, but the patient is on the mend.

Why: "On the mend" is used for living things recovering from illness or injury, not broken machines.

Incorrect

I caught a bug, so I feel fit as a fiddle.

Correct

I caught a bug, so I feel sick as a dog.

Why: Catching a bug means getting sick. 'Fit as a fiddle' means perfectly healthy, which is the opposite.

🎮 Mini Quiz

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Frequently Asked Questions

Quick answers to common questions.

What is a sickness idiom?

A sickness idiom is a figurative expression used to describe illness, health, or recovery. For example, 'under the weather' means feeling ill, not literally standing in the rain.

Why are sickness idioms so hard for ESL learners?

Because translating them word-for-word makes no sense. If you translate 'toss your cookies' literally, it sounds like baking. ESL learners must memorize the figurative meaning as a whole.

Are sickness idioms used in professional settings?

Yes. 'Under the weather' is the standard polite phrase used in professional emails to call in sick. 'Clean bill of health' is also common in business to describe a successful audit.

Can I use sickness idioms in formal academic writing?

Generally, no. Medical and scientific papers require precise, literal terminology. However, idioms like 'a clean bill of health' can be used metaphorically in economics or history papers.

What is the difference between 'on the mend' and 'out of the woods'?

'On the mend' means the healing process has begun. 'Out of the woods' is more serious; it means the patient has survived the most dangerous, critical phase of an illness.

Do other languages have sickness idioms?

Yes! Every language has metaphors for health. However, the imagery differs. English compares illness to weather ('under the weather'), while other languages might compare it to weight or shadows.

What does it mean to 'kick the bucket'?

It is a highly informal, slang idiom meaning to die. It should only be used in casual contexts and never in polite conversation with someone who is grieving.

Is 'feeling blue' a sickness idiom?

Not exactly. 'Feeling blue' refers to sadness or mild depression (mental health), whereas sickness idioms like 'under the weather' usually refer to physical illness.

What does it mean to 'catch a bug'?

It means to get a mild infectious illness, like a cold or a 24-hour stomach virus. It does not mean literally catching an insect.

How can I learn English sickness idioms faster?

Learn them in context. Group them by stage of illness (getting sick, feeling terrible, recovering) and practice using them in sentences about your own health experiences.