Idioms based on health. Select an idiom for more details. Also try Health Idioms Quiz.
If someone has a new lease of life, they have a new enthusiasm for living.
You can say someone is a pain in the neck if they annoy you, or something is a pain in the neck if you don't like doing it.
You can say something is a shot in the arm if it gives a person or an organisation renewed energy or enthusiasm.
If something does you the world of good, it makes you feel a lot better.
If you feel as fresh as a daisy, you feel energetic and lively.
If you're ill at ease, you feel tense or you can't relax in a situation.
Food that is bad for us because it contains large amounts of harmful substances like artificial colouring, preservatives, salt, refined sugar, and so on.
You can say something was just what the doctor ordered when it was exactly what was needed.
If you kick the habit, you manage to stop doing something that has become a bad habit.
If you say you're on your last legs, it can mean you're close to exhaustion, or it can mean you're close to death. If a thing is on its last legs, it's close to breaking or wearing out.
You recharge your batteries if you do something to regain your energy after a period of hard work.
If you're as sick as a dog, you're very sick.
If someone sticks out like a sore thumb, or stands out like a sore thumb, everyone notices them because they're not the same as the people around them.
If someone or something is having teething problems, or teething troubles, they're having problems during the early stages of something.
If you are under the weather, you're not feeling well.
If someone has verbal diarrhoea, they can't stop talking.
If you have vim and vigor, you have lots of energy and enthusiasm for life.
If you show something warts and all, you show it exactly as it is without trying to hide any of its faults or weaknesses.
If you go weak at the knees, you feel an emotion so strongly that it makes you feel unstable on your feet.
You can say "you are what you eat" when you want to point out the connection between food and health.