> Alive And Kicking: In good health despite health problems
E.g. I had coronary bypass surgery last winter, but I’m alive and kicking!
> As fit as a fiddle: To be healthy and physically fit
E.g. My grandfather is ninety years old but he is as fit as a fiddle.
> Back on one’s feet: Physically healthy again
E.g. My mother is back on her feet after being sick for two weeks.
> Go Under the Knife: Undergo surgery
E.g. I’m going under the knife next month to try to solve my knee problems. Hope it helps!
> Have one foot in the grave: To be near death (usually because of old age or illness)
E.g. My uncle is very sick and has one foot in the grave.
> Run in the family: To be a common family characteristic
E.g. The serious illness runs in the family of my friend.
> Snake Oil: Medicine of unproven value; fraudulent medicine
E.g. The Internet is full of people who sell snake oil that won’t help you at all with your medical problems.
> Under the weather: Not feeling well
E.g. My boss has been under the weather all week and has not come to work during that time.
Checkout More Common English Idioms
used for IELTS Speaking Exam