50 Idioms for Illness and Feeling Sick (Meanings)

Idioms are creative expressions where words together carry a hidden meaning different from their literal sense. People use them in everyday speech to add color, warmth, and descriptive imagery when talking about health. In this article, you will learn fifty interesting idioms about catching a bug, feeling unwell, and recovering from illness.

In this lesson, we will look at idioms that mean feeling sick or dealing with poor health. Let us get started and explore some of these helpful expressions.

Idioms for Illness

1. Under the weather

Definition: Feeling slightly sick, tired, or unwell physically.

Used in a Sentence: Liam stayed home from school because he was feeling a bit under the weather. / If you feel under the weather, make sure to rest in bed and drink water.

Similar Expressions: Unwell / Sickly

2. Catch a bug

Definition: To contract a common viral illness or mild infection from others.

Used in a Sentence: Many students in the classroom managed to catch a bug during the change of seasons. / Wash your hands frequently so you do not catch a bug at school.

Similar Expressions: Fall ill / Contract sickness

3. Feel like death warmed up

Definition: To feel extremely sick, exhausted, and miserable all over.

Used in a Sentence: After waking up with a high fever and a sore throat, she felt like death warmed up. / He dragged himself out of bed looking like death warmed up.

SimilarExpressions: Awful sick / Terrible shape

4. Out of sorts

Definition: Feeling physically uncomfortable, irritable, or mildly sick.

Used in a Sentence: The puppy has been out of sorts all morning and refuses to eat its food. / Whenever the barometric pressure drops, my joints make me feel out of sorts.

Similar Expressions: Unwell / Off balance

5. Green around the gills

Definition: Looking pale, sickly, or nauseated in the face.

Used in a Sentence: The choppy boat ride made several passengers turn green around the gills. / When he smelled the spoiled milk, he looked green around the gills.

Similar Expressions: Looking pale / Nauseous

6. Run down

Definition: Feeling physically exhausted, weak, and vulnerable to catching illnesses.

Used in a Sentence: Working late every night left her feeling completely run down and prone to colds. / Take a few days off to rest if you feel run down.

Similar Expressions: Exhausted / Fatigued

7. Off color

Definition: Looking and feeling slightly unwell or paler than usual.

Used in a Sentence: The teacher looked a bit off color during the morning assembly. / If your cat acts off color, it might be time for a checkup.

Similar Expressions: Unwell / Pale

8. Sick as a dog

Definition: Experiencing severe illness, nausea, or intense physical discomfort.

Used in a Sentence: Eating too much candy at the fair left him sick as a dog all night. / The poor puppy was sick as a dog after eating bad table scraps.

Similar Expressions: Very sick / Extremely ill

9. Right as rain

Definition: Recovering completely from an illness and feeling healthy again.

Used in a Sentence: After a long nap and some warm soup, she was right as rain. / Take your medicine and you will be right as rain by tomorrow morning.

Similar Expressions: Fully recovered / Healthy again

10. Kick the bug

Definition: To successfully fight off an infection and get better.

Used in a Sentence: It took him a whole week to kick the bug and return to soccer practice. / Drink plenty of orange juice to help your body kick the bug.

Similar Expressions: Recover / Beat the sickness

11. On the mend

Definition: Improving in health after being sick for several days.

Used in a Sentence: Grandma is finally on the mend after catching a bad winter cold. / The veterinarian said our cat is on the mend and can eat solid food.

Similar Expressions: Healing / Recovering

12. Down with the flu

Definition: Bedridden and suffering from a strong viral infection.

Used in a Sentence: Half of our basketball team went down with the flu right before the finals. / Mom stayed home from work because she came down with the flu.

Similar Expressions: Sick in bed / Flu-ridden

13. Cough your lungs out

Definition: To experience a severe, loud, and continuous coughing fit.

Used in a Sentence: The dusty attic made everyone start coughing their lungs out. / He spent the whole night coughing his lungs out from the chest cold.

Similar Expressions: Heavy coughing / Severe cough

14. Pounding head

Definition: A painful headache that feels like continuous hitting inside your skull.

Used in a Sentence: Staring at the computer screen too long gave her a pounding head. / He woke up with a pounding head and asked for quiet.

Similar Expressions: Throbbing headache / Bad head pain

15. Catch your death of cold

Definition: To become extremely cold and risk catching a serious illness.

Used in a Sentence: Put on your heavy winter jacket or you will catch your death of cold outside. / Standing in the freezing rain without boots is a great way to catch your death of cold.

Similar Expressions: Freeze sick / Severe chill

16. Swollen glands

Definition: Enlarged lymph nodes in the neck indicating your body is fighting an infection.

Used in a Sentence: The doctor checked his throat because he complained about swollen glands. / Having sore, swollen glands usually means a cold is starting.

Similar Expressions: Infected nodes / Neck swelling

17. Coming down with something

Definition: Feeling the early, subtle symptoms of an impending illness.

Used in a Sentence: I have a scratchy throat and feel like I am coming down with something. / Stay home if you feel like you are coming down with something.

Similar Expressions: Catching a cold / Getting sick

18. Weak at the knees

Definition: Feeling physically unsteady, dizzy, and faint due to illness or fatigue.

Used in a Sentence: The high fever made her feel weak at the knees when she stood up. / Climbing five flights of stairs left him weak at the knees.

Similar Expressions: Faint / Wobbly legs

19. Dizzy spell

Definition: A brief period of lightheadedness and loss of balance.

Used in a Sentence: Stand up slowly so you do not experience a dizzy spell. / The sudden heat caused her to have a dizzy spell in the garden.

Similar Expressions: Lightheadedness / Faintness

20. Bedridden

Definition: Confined to bed because an illness is too severe for movement.

Used in a Sentence: The strong infection left him bedridden for nearly a week. / Patients with severe flu symptoms are often bedridden until fevers break.

Similar Expressions: Confined to bed / Housebound sick

21. A dose of your own medicine

Definition: A figurative phrase sometimes used when dealing with a stubborn illness treatment.

Used in a Sentence: Taking the bitter cough syrup felt like getting a harsh dose of medicine. / The doctor prescribed a strong dose of medicine to clear the infection.

Similar Expressions: Medical treatment / Healing cure

22. Catch a chill

Definition: To feel a sudden onset of coldness that leads to body aches or sickness.

Used in a Sentence: Swimming in the cold lake caused him to catch a chill. / Wrap yourself in a blanket so you do not catch a chill.

Similar Expressions: Get cold / Catch a draft

23. Run a fever

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

Used in a Sentence: The toddler started to run a fever late in the afternoon. / Check your forehead with a thermometer to see if you are running a fever.

Similar Expressions: Have a temperature / Feverish state

24. Box of tissues

Definition: A household item you constantly need nearby when dealing with a heavy cold.

Used in a Sentence: A severe runny nose meant he went through a whole box of tissues in two days. / Keep a box of tissues on your desk during allergy season.

Similar Expressions: Sneezing gear / Cold supplies

25. Feel washed out

Definition: Feeling pale, drained of color, and completely exhausted from sickness.

Used in a Sentence: Fighting the stomach bug left her looking and feeling completely washed out. / Take a warm bath if you feel washed out from the long week.

Similar Expressions: Drained / Exhausted

26. Fever pitch

Definition: A state of intense heat or extreme body temperature during an illness.

Used in a Sentence: His temperature reached a fever pitch before the medicine finally worked. / The summer heatwave brought everyone’s discomfort to a fever pitch.

Similar Expressions: High fever / Extreme heat

27. Sneeze your head off

Definition: To experience a rapid series of loud, continuous sneezes.

Used in a Sentence: The spring pollen caused her to sneeze her head off in the yard. / Sitting near the dusty books made him sneeze his head off.

Similar Expressions: Constant sneezing / Allergy fit

28. Phlegmy throat

Definition: A chest congestion issue causing a thick, rattling sound when breathing.

Used in a Sentence: The chest cold gave him a phlegmy throat that made talking difficult. / Drink warm lemon water to soothe a phlegmy throat.

Similar Expressions: Congested throat / Mucus buildup

29. Out of commission

Definition: Temporarily unable to work, study, or play due to being sick.

Used in a Sentence: With a broken ankle and a bad cold, he was completely out of commission. / The stomach virus put the entire family out of commission for days.

Similar Expressions: Out of action / Temporarily disabled

30. Body aches

Definition: A dull, widespread pain in muscles and joints caused by a viral infection.

Used in a Sentence: The flu virus gave her severe body aches all over. / Taking a warm bath helps ease the body aches that come with a cold.

Similar Expressions: Sore muscles / Joint pain

31. Catch a bug going around

Definition: To contract whatever viral illness is currently spreading through a community.

Used in a Sentence: Everyone at the office seemed to catch a bug going around. / Try to wash your hands so you do not catch a bug going around school.

Similar Expressions: Catching the flu / Local illness

32. Heavy chest

Definition: A tight, congested feeling in your lungs making it hard to breathe easily.

Used in a Sentence: The bronchitis left him with a heavy chest and a persistent cough. / Vapor rubs help relieve a heavy chest during winter nights.

Similar Expressions: Chest tightness / Lung congestion

33. On the sick list

Definition: Formally recorded as being absent or unwell due to an illness.

Used in a Sentence: Three players from our soccer team were on the sick list this weekend. / Check the classroom attendance sheet to see who is on the sick list.

Similar Expressions: Unwell register / Absent sick

34. Stuffed up

Definition: Having nasal passages completely blocked by mucus from a cold.

Used in a Sentence: Allergies left his nose completely stuffed up all morning. / Using saline spray helps clear a stuffed up head.

Similar Expressions: Nasal congestion / Blocked nose

35. Catch a virus

Definition: To become infected with a microscopic germ that causes sickness.

Used in a Sentence: It is easy to catch a virus when people nearby are sneezing. / Taking vitamins helps your immune system fight off a virus.

Similar Expressions: Viral infection / Germ sickness

36. Flulike symptoms

Definition: A collection of body aches, chills, and fatigue indicating a flu.

Used in a Sentence: He stayed home because he woke up with typical flulike symptoms. / Pay attention if you notice any flulike symptoms developing.

Similar Expressions: Flu signs / Sickness symptoms

37. Laid low

Definition: Forced to lie down and rest because an illness overpowered you.

Used in a Sentence: The stubborn stomach bug laid low nearly everyone in the dormitory. / Being laid low by a fever is no fun when the weather is nice.

Similar Expressions: Overpowered by sickness / Bedridden

38. Pale as a ghost

Definition: Having completely white, colorless skin due to shock, illness, or fever.

Used in a Sentence: After feeling dizzy, she looked as pale as a ghost and sat down. / The sudden nausea made him look pale as a ghost.

Similar Expressions: Very pale / White-faced

39. Hit by a truck

Definition: A dramatic way to describe feeling completely crushed by exhaustion or sickness.

Used in a Sentence: Waking up with the flu made him feel like he had been hit by a truck. / After the long flight and illness, she felt like she was hit by a truck.

Similar Expressions: Crushed by fatigue / Extremely worn out

40. Catch a cold

Definition: To contract a mild respiratory infection causing sneezes and sniffles.

Used in a Sentence: Walking outside without a coat in autumn can help you catch a cold. / Wash your hands frequently so you do not catch a cold.

Similar Expressions: Get sick / Mild infection

41. Run a temperature

Definition: Having an elevated body thermometer reading due to an infection.

Used in a Sentence: The school nurse checked and found out he was running a temperature. / If the baby starts running a temperature, call the pediatrician.

Similar Expressions: Have a fever / Hot temperature

42. Sniffling and sneezing

Definition: Making frequent nasal sounds and sudden sneezes from a cold or allergies.

Used in a Sentence: Spring pollen had everyone in the office sniffling and sneezing. / He walked around the house sniffling and sneezing all afternoon.

Similar Expressions: Cold symptoms / Allergy sneezes

43. Knocked flat

Definition: Overpowered so thoroughly by an illness that you cannot get up.

Used in a Sentence: The severe bout of pneumonia knocked her flat for two weeks. / A sudden migraine headache knocked him flat on the sofa.

Similar Expressions: Overpowered / Brought down

44. Convalescing

Definition: Spending time recovering health and strength after a serious illness.

Used in a Sentence: She spent the sunny afternoon convalescing on the porch swing. / The patient is convalescing nicely in the quiet recovery room.

Similar Expressions: Healing / Recovering strength

45. Shivering with chills

Definition: Shaking uncontrollably because your body temperature is dropping or spiking.

Used in a Sentence: The sudden fever left him shivering with chills under three blankets. / She wrapped up in a heavy quilt while shivering with chills.

Similar Expressions: Shaking cold / Fever chills

46. Rasping breath

Definition: A harsh, rough sound made while breathing due to a sore throat or lungs.

Used in a Sentence: The heavy cold gave him a noticeable rasping breath. / The doctor listened closely to his rasping breath with a stethoscope.

Similar Expressions: Rough breathing / Wheezing sound

47. Sick leave

Definition: Time taken off from work or school due to being unwell.

Used in a Sentence: He took three days of sick leave to recover from his stomach flu. / Make sure to submit your doctor’s note for sick leave.

Similar Expressions: Medical absence / Health break

48. Out of action

Definition: Unable to participate in normal daily activities because of illness.

Used in a Sentence: A sprained wrist and a fever put him out of action for sports. / The player was out of action for the entire weekend tournament.

Similar Expressions: Inactive / Sidelined

49. Faint feeling

Definition: A slight sensation that you might lose consciousness or pass out.

Used in a Sentence: Skipping breakfast gave her a faint feeling during morning assembly. / Sit down with your head down if you get a faint feeling.

Similar Expressions: Lightheadedness / Dizziness

50. Batten down the defenses

Definition: A figurative way of boosting your immune system to fight a coming illness.

Used in a Sentence: When cold season hits, you need to batten down the defenses with vitamins. / Eat healthy foods to batten down the defenses against germs.

Similar Expressions: Boost immunity / Protect health

Exercise to Practice

1. Liam stayed home from school because he was feeling a bit under the weather.
2. After waking up with a high fever and a sore throat, she felt like death warmed up by running a fast marathon.
3. The choppy boat ride made several passengers turn green around the gills.
4. Take your medicine and you will be right as rain by tomorrow morning while eating sticky candy.
5. Half of our basketball team went down with the flu right before the finals.
6. Staring at the computer screen too long gave her a pounding head by improving her vision.
7. The toddler started to run a fever late in the afternoon.
8. Fighting the stomach bug left her looking and feeling completely washed out while full of active energy.
9. Everyone at the office seemed to catch a bug going around.
10. The school nurse checked and found out he was running a temperature by giving him an ice cream cone.
11. Walking outside without a coat in autumn can help you catch a cold.
12. The severe bout of pneumonia knocked her flat for two weeks while she danced ballet on stage.
13. She spent the sunny afternoon convalescing on the porch swing.
14. He took three days of sick leave to recover from his stomach flu by going to a noisy amusement park.
15. Skipping breakfast gave her a faint feeling during morning assembly.

Answer Key

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

Conclusion

Learning these idioms helps you describe illness, poor health, and recovery using colorful and descriptive language. By practicing them regularly, you can talk about physical feelings much more clearly in your everyday writing and conversation.

Try using one or two of these expressions the next time you talk about resting at home or recovering from a cold. You will find that using imaginative phrases makes discussing health a lot more engaging.

Frequently Asked Questions

What are some common idioms for illness?

Some popular choices include feeling under the weather, being sick as a dog, and getting back right as rain. These expressions help people describe health issues in a creative way.

Why do we use idioms in English?

Idioms add charm, emotion, and color to our speech instead of using plain literal words. They help us share everyday physical experiences like catching a cold in memorable ways.

How can students learn these expressions easily?

Students can learn idioms best by connecting them to common health experiences like staying home with a cold, taking medicine, or recovering in bed. Using them in simple sentences helps them stick in your memory.

Are these idioms okay to use in formal writing?

Most of these idioms work wonderfully in personal stories, creative essays, or casual conversations. However, strict medical or academic research papers require direct and literal vocabulary.

Do all English speakers understand these health idioms?

Yes, most of these expressions are widely recognized across English-speaking regions, though slight regional variations in phrasing can sometimes occur.