50 Idioms for Feeling Sick (Meanings and Examples)

Idioms are creative phrases where the whole meaning is different from the standard dictionary meaning of each word. People use these interesting expressions to explain feeling unwell, facing illnesses, or recovering from a fever without sounding too formal. Learning these handy phrases helps you describe physical symptoms, understand medical stories, and communicate clearly with your family and friends. In this lesson, you will discover many common expressions that describe feeling under the weather or taking time to heal.

In this lesson, we’ll look at idioms that mean feeling unwell, suffering from an illness, and regaining your strength. Let’s get started and explore some of these helpful expressions.

Idioms for Feeling Sick

1. Under the weather

Definition: Feeling slightly sick, tired, or unwell.

Used in a Sentence: Emma stayed home from school because she was feeling under the weather. / My dad woke up under the weather with a scratchy throat.

Similar Expressions: Out of sorts / Feeling poorly

2. Run down

Definition: Feeling exhausted, weak, and lacking energy due to sickness or overwork.

Used in a Sentence: After studying for three days straight, Toby felt completely run down. / Eating healthy foods helps you avoid feeling run down during winter.

Similar Expressions: Worn out / Drained of energy

3. Off color

Definition: Looking or feeling slightly ill, pale, or unusual.

Used in a Sentence: Mom noticed that Clara looked a bit off color during breakfast. / He felt off color all afternoon and decided to take an early nap.

Similar Expressions: Pale looking / Slightly unwell

4. Dog sick

Definition: Very ill, usually with a bad stomach ache or heavy nausea.

Used in a Sentence: Sam was as dog sick as could be after eating green apples. / The spoiled milk made him dog sick for the entire evening.

Similar Expressions: Sick as a dog / Seriously ill

5. At death’s door

Definition: Extremely sick or weak and feeling like you might not recover.

Used in a Sentence: Even though he claimed he was at death’s door, it was just a mild cold. / The old cat looked like it was at death’s door before the vet helped it.

Similar Expressions: Critically ill / Dangerously sick

6. Green around the gills

Definition: Looking pale, nauseous, or sick to your stomach.

Used in a Sentence: The bumpy boat ride left half the passengers looking green around the gills. / He turned green around the gills right after riding the big roller coaster.

Similar Expressions: Sick to the stomach / Looking nauseous

7. Catch your death

Definition: Catching a very severe and dangerous cold by going out in freezing weather.

Used in a Sentence: Put on your heavy winter coat or you will catch your death outside. / Running through the freezing rain without boots is a fast way to catch your death.

Similar Expressions: Catch a bad cold / Fall terribly ill

8. Out of commission

Definition: Unable to move or work properly because of an injury or illness.

Used in a Sentence: A sprained ankle put our best soccer runner out of commission for two weeks. / Flu season put half of the office staff out of commission this Monday.

Similar Expressions: Bedridden / Unable to function

9. Laid up

Definition: Forced to rest in bed because you are sick or recovering from an injury.

Used in a Sentence: Uncle Joe was laid up in bed for a week with a broken leg. / She was laid up with a high fever during the entire weekend holiday.

Similar Expressions: Bedbound / Resting up

10. Bring up your boots

Definition: Throwing up or vomiting violently due to a severe stomach illness.

Used in a Sentence: The stomach bug had him bringing up his boots all night long. / Eating bad seafood made the sailor bring up his boots over the side of the ship.

Similar Expressions: Toss your cookies / Vomit heavily

11. On the mend

Definition: Slowly recovering, getting better, and regaining your health after being sick.

Used in a Sentence: After resting for three days, my little sister is finally on the mend. / His broken arm is healing nicely and he is definitely on the mend.

Similar Expressions: Getting better / Recovering well

12. Back on your feet

Definition: Fully recovered and returning to your normal physical activities after an illness.

Used in a Sentence: Good medicine helped grandma get back on her feet within a week. / I hope you get back on your feet in time for the big basketball tournament.

Similar Expressions: Fully recovered / Well again

13. Black out

Definition: Suddenly losing consciousness or fainting for a short period of time.

Used in a Sentence: The hot afternoon sun made the runner black out at the finish line. / She felt dizzy from the fever and blacked out on the living room sofa.

Similar Expressions: Faint away / Pass out

14. Come down with

Definition: Catching an illness or starting to show symptoms of a sick condition.

Used in a Sentence: I think I am coming down with a sore throat and a runny nose. / Half the classroom came down with chickenpox at the same time.

Similar Expressions: Catch a virus / Fall ill with

15. Pale as a sheet

Definition: Looking very white in the face because of fear, shock, or severe illness.

Used in a Sentence: After throwing up his lunch, Ben was as pale as a sheet. / Her face turned as pale as a sheet when her temperature began to rise.

Similar Expressions: Ghostly pale / Colorless in the face

16. Out like a light

Definition: Falling asleep extremely fast because of deep exhaustion or illness.

Used in a Sentence: The fever medicine made the tired toddler go out like a light. / As soon as my head hit the pillow, I was out like a light.

Similar Expressions: Fast asleep / Deep in slumber

17. Sick as a parrot

Definition: Feeling thoroughly miserable, deeply unwell, or extremely nauseous.

Used in a Sentence: He felt sick as a parrot after spending the entire night on a bumpy bus. / Eating that entire bag of sour candy left her sick as a parrot.

Similar Expressions: Extremely nauseous / Miserably sick

18. Throw up

Definition: Vomiting food or liquid from your stomach when you are ill.

Used in a Sentence: The dizzy feeling made the young boy throw up in the bathroom sink. / If you feel like you need to throw up, drink a little cold water.

Similar Expressions: Be sick / Vomit up

19. Bug going around

Definition: A contagious sickness or virus spreading among people in a community.

Used in a Sentence: There is a bad stomach bug going around the elementary school right now. / Make sure to wash your hands because there is a flu bug going around.

Similar Expressions: Spreading virus / Local illness

20. Frog in your throat

Definition: A scratchy, hoarse feeling in your throat that makes speaking difficult.

Used in a Sentence: Excuse me for coughing, but I have a huge frog in my throat today. / Her speech was delayed because she woke up with a frog in her throat.

Similar Expressions: Hoarse voice / Scratchy throat

21. Look like warmed-over death

Definition: Looking extremely sick, exhausted, and pale after a rough illness.

Used in a Sentence: You look like warmed-over death, so please go back to bed immediately. / After fighting the flu all week, he still looked like warmed-over death.

Similar Expressions: Looking terrible / Deathly pale

22. In a bad way

Definition: In a very serious, painful, or unhealthy physical condition.

Used in a Sentence: The stray puppy was in a bad way before the animal shelter rescued it. / His cough put him in a bad way until the doctor gave him syrup.

Similar Expressions: Poorly off / Very unwell

23. Fit as a fiddle

Definition: Being in excellent health, strong physical shape, and completely free of illness.

Used in a Sentence: My eighty-year-old grandfather is still as fit as a fiddle. / After resting all weekend, I felt fit as a fiddle and ready for school.

Similar Expressions: In great shape / Healthy and strong

24. Clean bill of health

Definition: A report from a medical doctor stating that you are completely healthy.

Used in a Sentence: The dentist gave my teeth a clean bill of health during my checkup. / After a quick checkup, the athlete got a clean bill of health to play.

Similar Expressions: Healthy report / Full recovery approval

25. Alive and kicking

Definition: Still living, healthy, and full of active energy despite age or illness.

Used in a Sentence: Do not worry about our old dog; he is still alive and kicking. / Even after a mild cold, the elderly neighbor was alive and kicking.

Similar Expressions: Active and well / Full of life

26. Picture of health

Definition: An ideal example of a person who looks completely healthy and strong.

Used in a Sentence: Eating fruits and exercising made the young athlete the picture of health. / With red cheeks and bright eyes, the baby was the picture of health.

Similar Expressions: Perfect health / Looking great

27. Right as rain

Definition: Feeling completely recovered, well, and back to normal health.

Used in a Sentence: A good night of sleep will make you feel right as rain by morning. / Take this warm soup and you will be right as rain tomorrow.

Similar Expressions: Perfectly fine / Fully cured

28. Sick to death of

Definition: Extremely annoyed, exhausted, or fed up with a situation or condition.

Used in a Sentence: I am sick to death of staying inside while waiting for my fever to drop. / She was sick to death of drinking bitter medicine every four hours.

Similar Expressions: Fed up / Tired of

29. Splitting headache

Definition: A very severe, sharp, and painful headache that hurts continuously.

Used in a Sentence: The loud construction noise gave me a splitting headache before noon. / She went into a dark room because she had a splitting headache.

Similar Expressions: Pounding head / Severe migraine

30. Off your feed

Definition: Having no appetite or desire to eat meals because of an illness.

Used in a Sentence: The sick kitten was off its feed and refused to eat its morning food. / He has been off his feed since his fever started yesterday evening.

Similar Expressions: Lacking appetite / Not eating

31. Cast iron stomach

Definition: An ability to eat any food without getting an upset stomach or feeling sick.

Used in a Sentence: My brother has a cast iron stomach and can eat hot peppers without problem. / You must have a cast iron stomach to eat spicy food while feeling sick.

Similar Expressions: Strong stomach / Tough belly

32. Out of it

Definition: Feeling confused, dizzy, or disconnected from reality due to medicine or fever.

Used in a Sentence: The strong cough syrup made him feel completely out of it for an hour. / She was out of it while running a high fever on Tuesday.

Similar Expressions: Dizzy and confused / Lightheaded

33. Nurse back to health

Definition: Taking careful care of a sick person or animal until they are well again.

Used in a Sentence: Mom nursed our pet rabbit back to health after its leg injury healed. / She nursed her brother back to health by giving him warm tea.

Similar Expressions: Care for / Heal up

34. Run a temperature

Definition: Having a body temperature that is higher than normal because of an infection.

Used in a Sentence: The school nurse called home because the boy was running a temperature. / I started running a temperature right after coming inside from the rain.

Similar Expressions: Have a fever / Burning up

35. Catch a cold

Definition: Becoming infected with a common, mild viral illness that causes sniffling.

Used in a Sentence: Wear a warm scarf so you do not catch a cold in the chilly wind. / He caught a cold after sitting next to a sneezing friend at lunch.

Similar Expressions: Fall sick / Get the sniffles

36. Bound and gagged by illness

Definition: Trapped in bed and unable to do anything fun due to severe sickness.

Used in a Sentence: He felt bound and gagged by illness while stuck inside all weekend. / Sickness kept her bound and gagged by illness during the field trip.

Similar Expressions: Helplessly sick / Stuck in bed

37. Toss your cookies

Definition: Throwing up food suddenly when feeling very sick to your stomach.

Used in a Sentence: The bumpy road made the backseat passenger toss his cookies into a bag. / He tossed his cookies after catching a bad stomach flu at camp.

Similar Expressions: Throw up / Vomit

38. In cold storage

Definition: Resting motionless in a cold room while taking time to recover from sickness.

Used in a Sentence: The sick patient remained in cold storage until his fever dropped down. / He stayed home in cold storage under heavy blankets to fight his cold.

Similar Expressions: Resting up / Keeping still

39. Feel like death warmed up

Definition: Feeling extremely sick, weak, and devoid of physical energy.

Used in a Sentence: I felt like death warmed up when I tried to stand up with the flu. / She felt like death warmed up and stayed under the covers all day.

Similar Expressions: Miserably ill / Terribly weak

40. Sick as a dog

Definition: Experiencing an intense, unpleasant stomach ache or heavy vomiting.

Used in a Sentence: After eating bad fish at the restaurant, he was as sick as a dog. / She stayed home from school because she was as sick as a dog.

Similar Expressions: Very nauseous / Extremely ill

41. At the end of your rope

Definition: Having no patience or energy left while dealing with a long illness.

Used in a Sentence: After coughing for two straight weeks, she was at the end of her rope. / The tired mom was at the end of her rope caring for three sick kids.

Similar Expressions: Out of patience / Exhausted completely

42. Drop like flies

Definition: Falling sick in very large numbers over a very short period of time.

Used in a Sentence: Students were dropping like flies when the flu hit our classroom. / Half the choir dropped like flies before the winter concert began.

Similar Expressions: Falling ill en masse / Sicken rapidly

43. Sick in bed

Definition: Resting in bed because you are too unwell to walk around or work.

Used in a Sentence: He was sick in bed for three whole days with a stomach bug. / She spent her birthday sick in bed with a sore throat and fever.

Similar Expressions: Confined to bed / Resting in bed

44. Take a turn for the worse

Definition: Suddenly becoming more ill or showing worse symptoms than before.

Used in a Sentence: The patient took a turn for the worse when his fever spiked high. / Her cold took a turn for the worse during the cold night hours.

Similar Expressions: Decline in health / Become sicker

45. Take a turn for the better

Definition: Starting to show signs of health recovery and feeling less sick.

Used in a Sentence: Her health took a turn for the better after taking the antibiotic. / We were glad when grandpa took a turn for the better at the hospital.

Similar Expressions: Show improvement / Start recovering

46. Touch and go

Definition: An uncertain situation where it is unclear if a sick person will recover.

Used in a Sentence: It was touch and go for a few hours while the fever remained high. / The doctor said the horse’s recovery was touch and go overnight.

Similar Expressions: Uncertain status / Critical state

47. Pale as a ghost

Definition: Having an unusually white face due to feeling sudden nausea or fainting.

Used in a Sentence: When he stood up too fast, his face went pale as a ghost. / She looked pale as a ghost right before she sat down to rest.

Similar Expressions: Ghostly pale / Colorless

48. Sick to your stomach

Definition: Experiencing nausea or feeling like your food wants to come up.

Used in a Sentence: Reading in the moving car always makes me sick to my stomach. / He was sick to his stomach after drinking lukewarm tap water.

Similar Expressions: Nauseous / Queasy

49. On your last legs

Definition: Extremely weak, exhausted, or near the end of physical strength from sickness.

Used in a Sentence: The tired marathon runner looked like he was on his last legs. / After hiking with a bad cold, I felt like I was on my last legs.

Similar Expressions: Near collapse / Exhausted

50. In the pink of health

Definition: Being in top physical condition, glowing with energy, and totally healthy.

Used in a Sentence: After her restful vacation, she returned in the pink of health. / Regular exercise keeps my whole family in the pink of health.

Similar Expressions: Perfectly well / Excellent condition

Exercise to Practice

1. Feeling under the weather means you are feeling full of energy and ready to play.
2. If someone is on the mend, their health is slowly getting better after an illness.
3. Looking green around the gills shows that a person feels completely fine and healthy.
4. Catching your death means you are getting a very severe cold from cold weather.
5. Being fit as a fiddle means you are very sick and must rest in bed all day long.
6. Blacking out means losing consciousness or fainting for a short amount of time.
7. A clean bill of health means the doctor confirmed that you are healthy.
8. Being sick as a dog means having a wonderful day filled with fun games.
9. If people drop like flies, many of them are falling sick at the same time.
10. Running a temperature means your body heat is normal and not high at all.
11. Being right as rain means you have fully recovered and feel great again.
12. Having a cast iron stomach means your stomach gets upset very easily.
13. Taking a turn for the worse means that your illness is getting more serious.
14. If you look like warmed-over death, you look rested, bright, and full of life.
15. Having a frog in your throat makes it hard for you to speak smoothly.

Answer Key

1. False
2. True
3. False
4. True
5. False
6. True
7. True
8. False
9. True
10. False
11. True
12. False
13. True
14. False
15. True

Conclusion

Learning common idioms for feeling sick helps students describe health issues clearly and understand conversations about illness. Recognizing these figurative phrases builds your vocabulary and makes reading storybooks much easier.

Try using some of these phrases the next time you talk about resting or recovering from a cold. Sharing these fun idioms with family and friends will make your daily English sound more natural and expressive.

Frequently Asked Questions

What are some common idioms for feeling sick?

Popular expressions include “under the weather,” “sick as a dog,” “run down,” and “green around the gills.” These phrases help people explain different types of illness, like colds or stomach aches, without using technical medical words. They are used often in everyday conversations.

Why do people say under the weather when they are sick?

This old phrase comes from sailors who went below the ship deck to protect themselves during bad weather. Sitting under the deck kept them safe from ocean spray when they felt seasick. Over time, it became a standard phrase for feeling unwell anywhere.

What is the difference between under the weather and at death’s door?

The phrase “under the weather” refers to a mild illness like a minor cold or feeling tired. On the other hand, “at death’s door” is a dramatic phrase used for very severe sickness or extreme physical weakness. Knowing the difference helps you choose the right tone.

Can students use idioms for feeling sick in school essays?

Yes, using these expressions can make creative stories and character descriptions much more interesting to read. They help convey how a character feels physically without repeating simple words like “ill.” Just make sure the expression fits the mood of your writing assignment.

What does right as rain mean when recovering from an illness?

“Right as rain” means that a person has made a complete recovery and feels totally healthy again. People use it to reassure others that rest or medicine will solve the problem quickly. It is an encouraging, positive phrase about good health.