50 Idioms for Sick (Meanings & Examples)

Idioms are fun phrases that mean something different from the words inside them. People use them to make their speaking and writing more colorful and exciting. In this lesson, you will learn fifty special idioms related to feeling unwell, catching a cold, and being sick.

In this lesson, we’ll look at idioms that mean fighting off an illness or recovering from health troubles. Let’s get started and explore some of these helpful expressions.

Idioms for Sick

1. Under the weather

Definition: To feel slightly ill, tired, or low in energy and health.

Used in a Sentence: Grandpa felt a bit under the weather this morning and stayed in bed to rest. / When I wake up early with a runny nose, I usually feel a bit under the weather.

Similar Expressions: Feel unwell / Be poorly

2. Sick as a dog

Definition: To feel extremely ill, nauseous, or miserable.

Used in a Sentence: After eating the spoiled food, he felt as sick as a dog all night. / The flu bug made her feel as sick as a dog for three days.

Similar Expressions: Extremely ill / Very sick

3. Off color

Definition: Looking or feeling slightly unwell, pale, or sickly.

Used in a Sentence: Maya looked a bit off color during science class, so the teacher sent her to the nurse. / Eating too much candy left him feeling off color.

Similar Expressions: Seem unwell / Look pale

4. Right as rain

Definition: Recovering completely from sickness to feel healthy and well again.

Used in a Sentence: After taking a long nap and drinking water, she felt right as rain. / Rest for a day, and you will be right as rain for school.

Similar Expressions: Fully recovered / Healthy again

5. Out of sorts

Definition: To feel physically unwell, grumpy, or out of your normal healthy balance.

Used in a Sentence: Catching a mild cold left him feeling out of sorts all afternoon. / When you are tired and out of sorts, it is best to take a break.

Similar Expressions: Unwell / Grumpy

6. Green around the gills

Definition: Looking pale, sickly, or nauseous, often due to motion sickness or illness.

Used in a Sentence: Riding the choppy waves on the boat made him look green around the gills. / She looked a bit green around the gills after eating the strange soup.

Similar Expressions: Look nauseous / Look pale

7. Run down

Definition: Feeling exhausted, weak, and vulnerable to catching an illness due to overwork.

Used in a Sentence: Staying up late studying all week left her feeling run down and prone to colds. / Eat healthy food so you don’t get run down.

Similar Expressions: Exhausted / Fatigued

8. Back on your feet

Definition: Fully recovered and standing healthy after a period of illness.

Used in a Sentence: It took him a week of rest, but he is finally back on his feet and playing soccer. / Soup and sleep will get you back on your feet quickly.

Similar expressions: Recovered / Healed

9. Catch a bug

Definition: To contract a minor illness, virus, or cold from someone else.

Used in a Sentence: Many students catch a bug during the change of seasons. / Wash your hands frequently so you don’t catch a bug at school.

Similar Expressions: Get sick / Fall ill

10. Alive and kicking

Definition: Recovered, active, and healthy after a scare or illness.

Used in a Sentence: After resting with the flu for days, the puppy was back alive and kicking. / Grandma recovered from her cold and is now alive and kicking.

Similar Expressions: Healthy / Active

11. Drop like flies

Definition: When many people in a group get sick with the same illness at the same time.

Used in a Sentence: During the winter flu season, students started to drop like flies in every classroom. / The cold virus made team members drop like flies.

Similar Expressions: Fall sick rapidly / Catch illness

12. Sick and tired

Definition: Feeling physically drained or emotionally exhausted by an ongoing problem or illness.

Used in a Sentence: She was sick and tired of coughing every time the weather turned cold. / Getting sick and tired of staying in bed made him eager to recover.

Similar Expressions: Exhausted / Fed up

13. At death’s door

Definition: An exaggerated expression for being extremely and dangerously ill.

Used in a Sentence: With a severe fever, the dramatic dog in the story acted like he was at death’s door. / He felt like he was at death’s door when he had the worst flu ever.

Similar Expressions: Extremely sick / Grave condition

14. In poor health

Definition: Experiencing ongoing weakness, chronic sickness, or delicate physical condition.

Used in a Sentence: Taking care of your diet helps prevent you from falling into poor health. / The stray cat was found in poor health before the vet helped it.

Similar Expressions: Unhealthy / Weak

15. Throw up

Definition: To vomit due to severe nausea, food poisoning, or illness.

Used in a Sentence: Eating too much ice cream too fast made the little boy throw up. / The stomach bug caused several kids to throw up at home.

Similar Expressions: Vomit / Be sick

16. Feel faint

Definition: To feel dizzy, weak, and close to passing out from illness or hunger.

Used in a Sentence: Standing under the hot sun for too long made her feel faint. / Skipping breakfast can make you feel faint during morning assembly.

Similar Expressions: Feel dizzy / Grow weak

17. Cough your lungs out

Definition: An exaggerated expression for coughing very hard and continuously due to a cold.

Used in a Sentence: The chest cold made him cough his lungs out all night long. / Drinking warm honey tea stopped her from coughing her lungs out.

Similar Expressions: Cough severely / Hack badly

18. Weather the illness

Definition: To successfully survive and recover from a severe sickness or infection.

Used in a Sentence: Strong medicine and rest helped her weather the illness over the weekend. / Drinking fluids helps your body weather the illness.

Similar Expressions: Fight sickness / Recover

19. On the mend

Definition: Healing and improving in health after being sick.

Used in a Sentence: After visiting the doctor and resting, grandpa is finally on the mend. / Her cold is getting better, and she is officially on the mend.

Similar Expressions: Healing / Improving

20. Out of commission

Definition: Unable to work, play, or attend school because of sickness or injury.

Used in a Sentence: Having a sprained ankle put him out of commission for soccer practice. / The flu left mom out of commission for two days.

Similar Expressions: Disabled temporarily / Sick in bed

21. Hit by a truck

Definition: A humorous exaggeration describing how sore, exhausted, and sick you feel.

Used in a Sentence: Waking up with a high fever made me feel like I had been hit by a truck. / After the intense workout and flu symptoms, she felt like she was hit by a truck.

Similar Expressions: Sore / Extremely worn out

22. Frail health

Definition: Having a delicate, weak physical state susceptible to sickness.

Used in a Sentence: Protecting elderly family members in frail health during flu season is important. / A healthy diet supports those with frail health.

Similar Expressions: Delicate condition / Weak state

23. Nursing a cold

Definition: Taking care of yourself while recovering from a minor respiratory illness.

Used in a Sentence: He spent the weekend resting on the couch, nursing a stubborn cold. / Mom stayed home on Friday, nursing a cold with hot tea.

Similar Expressions: Recovering / Treating illness

24. Full of aches and pains

Definition: Feeling widespread physical soreness throughout your body due to illness or age.

Used in a Sentence: Catching the flu left her full of aches and pains from head to toe. / Stretching helps prevent feeling full of aches and pains.

Similar Expressions: Sore / Uncomfortable

25. Under the weather’s grip

Definition: Being strongly affected and slowed down by a cold or flu.

Used in a Sentence: He was caught under the weather’s grip and missed his favorite concert. / Medicine helps release you from the weather’s grip.

Similar Expressions: Sick / Affected by flu

26. In sick bay

Definition: Staying in the school nurse’s office or medical room because you feel unwell.

Used in a Sentence: Feeling dizzy during gym class meant she had to spend an hour in sick bay. / The nurse let him rest quietly in sick bay.

Similar Expressions: Medical room / Nurse’s office

27. Catch your death of cold

Definition: A warning phrase meaning you will get severely sick if you go out without warm clothes.

Used in a Sentence: Put on your winter jacket or you will catch your death of cold outside! / Mom warned us not to play in the rain and catch our death of cold.

Similar Expressions: Get very sick / Catch chill

28. Weak as a kitten

Definition: Feeling extremely physically weak and lacking energy due to an illness.

Used in a Sentence: After recovering from the high fever, she felt as weak as a kitten. / The stomach bug left him feeling as weak as a kitten.

Similar Expressions: Very weak / Drained

29. Laid low

Definition: Forced to stay in bed and rest because a severe illness overpowered you.

Used in a Sentence: A stubborn strain of the flu laid low half the office workers. / Being laid low by a fever meant missing the class field trip.

Similar Expressions: Disabled by sickness / Stricken down

30. Aching joints

Definition: A common physical symptom of illness or flu where your joints feel sore.

Used in a Sentence: The viral infection gave him a fever and aching joints. / Resting helps relieve aching joints during a cold.

Similar Expressions: Joint pain / Sore body

31. Suffer from

Definition: To experience pain, illness, or distress from a specific health condition.

Used in a Sentence: Some children suffer from seasonal allergies when spring flowers bloom. / He tended to suffer from headaches when looking at screens too long.

Similar Expressions: Experience illness / Endure pain

32. Pale as a ghost

Definition: Having very white or colorless skin due to shock, fear, or sudden illness.

Used in a Sentence: When she felt dizzy and sick, her face turned as pale as a ghost. / He looked as pale as a ghost before fainting from the flu.

Similar Expressions: Very pale / White-faced

33. Sick leave

Definition: Official time off from work or school granted because you are ill.

Used in a Sentence: Dad took a day of sick leave to recover from his bad cough. / The school policy grants excused absences for medical sick leave.

Similar Expressions: Medical absence / Time off for illness

34. Infectious smile

Definition: Contrast idiom: a positive expression, but sometimes linked metaphorically to catching happiness or colds.

Used in a Sentence: Even when feeling sick, her cheerful attitude had an infectious charm. / Cold viruses are infectious, so cover your cough.

Similar Expressions: Contagious / Spreading fast

35. Take a turn for the worse

Definition: When a sick person’s health suddenly deteriorates and becomes more serious.

Used in a Sentence: The patient started recovering, but then took a turn for the worse overnight. / Monitor your fever so it doesn’t take a turn for the worse.

Similar Expressions: Worsen / Decline in health

36. Out cold

Definition: Unconscious or deeply asleep due to exhaustion, fainting, or heavy medication.

Used in a Sentence: The heavy cold medicine knocked him out cold for ten hours. / After hitting his head, he was out cold for a moment.

Similar Expressions: Unconscious / Deeply asleep

37. On the sick list

Definition: Officially recorded as being absent due to illness.

Used in a Sentence: Three players were on the sick list before Saturday’s big game. / Her name was added to the school sick list after catching the flu.

Similar Expressions: Absent sick / Recorded ill

38. Bitten by the bug

Definition: Catching a virus or illness spreading around your community.

Used in a Sentence: Once one family member caught the cold, we all got bitten by the bug. / Be careful not to get bitten by the bug going around school.

Similar Expressions: Get infected / Catch virus

39. Peak of health

Definition: Contrast phrase: the opposite of being sick, meaning having maximum fitness and wellness.

Used in a Sentence: Eating fruits and exercising regularly keeps you at the peak of health. / He felt at the peak of health after his winter recovery.

Similar Expressions: Very healthy / Prime condition

40. Breathing hard

Definition: Experiencing shortness of breath due to a heavy cold, asthma, or exertion.

Used in a Sentence: The asthma flare-up left him coughing and breathing hard. / Climbing the stairs while sick had her breathing hard.

Similar Expressions: Short of breath / Wheezing

41. Run a fever

Definition: To have a body temperature higher than normal due to fighting an infection.

Used in a Sentence: Touching his forehead revealed that he was running a high fever. / Staying hydrated is crucial when you run a fever.

Similar Expressions: Have temperature / Be feverish

42. Flare-up

Definition: A sudden return or worsening of chronic illness symptoms.

Used in a Sentence: Eating certain foods can trigger a painful stomach flare-up. / She took her medicine to calm the sudden allergy flare-up.

Similar Expressions: Sudden worsening / Symptom return

43. Knocked flat

Definition: Overpowered completely by a sudden, severe illness or fatigue.

Used in a Sentence: The stomach virus knocked her flat for two whole days. / A sudden fever knocked him flat right before the weekend.

Similar Expressions: Overpowered / Bedridden

44. Wiped out

Definition: Feeling completely drained of all energy due to sickness or hard work.

Used in a Sentence: Fighting off a fever left him feeling completely wiped out. / After the long flight and cold symptoms, she was wiped out.

Similar Expressions: Exhausted / Drained

45. Infectious disease

Definition: A medical condition that can spread easily from person to person.

Used in a Sentence: Hospitals take strict precautions to prevent the spread of infectious disease. / Washing hands stops infectious disease transmission.

Similar Expressions: Contagious illness / Germ spreading

46. Out of sorts and health

Definition: Feeling both grumpy and physically unwell at the same time.

Used in a Sentence: The lingering cough left her feeling out of sorts and health all week. / Rest cures feeling out of sorts and health.

Similar Expressions: Unwell / Miserable

47. Hospitalized

Definition: Admitted to a hospital for medical treatment due to severe illness.

Used in a Sentence: The severe infection resulted in him being hospitalized for observation. / Doctors ensured the patient recovered safely after being hospitalized.

Similar Expressions: Admitted to hospital / Receiving care

48. Bedridden

Definition: Confined to bed all day because you are too weak or sick to stand.

Used in a Sentence: The severe bout of flu left her bedridden for nearly a week. / Patients who are bedridden require constant care and rest.

Similar Expressions: Confined to bed / Sick in bed

49. In recovery

Definition: The healing period between being acutely sick and fully healthy again.

Used in a Sentence: After surgery, he spent two quiet weeks in recovery at home. / Patients in recovery need peace, quiet, and good nutrition.

Similar Expressions: Healing phase / Post-illness

50. Sickly pale

Definition: Having an unhealthy, pale skin tone caused by illness.

Used in a Sentence: The flu made her look sickly pale under the classroom lights. / Rest restored color to his sickly pale face.

Similar Expressions: Unhealthy pallor / Pale look

Exercise to Practice

1. Grandpa felt a bit under the weather this morning and stayed in bed to rest.
2. After eating the spoiled food, he felt as sick as a dog all night.
3. Maya looked a bit off color during science class, so the teacher sent her to the nurse.
4. After taking a long nap and drinking water, she felt terrible and stayed sick.
5. Catching a mild cold left him feeling out of sorts all afternoon.
6. Riding the choppy waves on the boat made him look green around the gills.
7. Staying up late studying all week left her feeling run down and prone to colds.
8. It took him a week of rest, but he is finally back on his feet and playing soccer.
9. Wash your hands frequently so you catch every germ and get sick easily.
10. After resting with the flu for days, the puppy was back alive and kicking.
11. During the winter flu season, students started to drop like flies in every classroom.
12. She was sick and tired of coughing every time the weather turned cold.
13. With a severe fever, the dramatic dog in the story acted like he was at death’s door.
14. Taking care of your diet helps prevent you from falling into poor health.
15. Eating too much ice cream too fast made the little boy run a marathon.

Answer Key

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

Conclusion

Learning these idioms helps make your writing and speaking much more colorful and fun. Instead of using plain words, you can use these special expressions to describe feeling unwell, catching a cold, and recovering from illness. Try using one or two of these idioms when you talk to your friends or write a story today. Notice how much brighter and more interesting your conversations become.

Frequently Asked Questions

What are some common idioms for sick?

Common idioms for sick include feeling under the weather, being as sick as a dog, and looking green around the gills. These phrases help describe illnesses and recovery in a colorful way.

Why do we use idioms in English?

We use idioms to make our language more expressive, creative, and interesting. They allow us to paint a picture with words instead of just stating simple facts.

How can I remember these idioms easily?

You can remember idioms by practicing them in daily conversations and writing your own funny sentences with them. Drawing pictures of what the literal words mean can also help you recall them.

Are idioms used in everyday spoken English?

Yes, native English speakers use idioms all the time in casual conversations, movies, books, and music. Learning them helps you understand what people mean when they talk or write.

Can I use these idioms in school writing?

You can use idioms in creative writing stories, journal entries, and speeches to make your writing stand out. Just remember to use formal language for serious reports and science papers.