You might have had sweaty palms or broken out in cold sweat before entering an examination hall, or felt giddy from being in a narrow space.
There is a chance now for you to overcome such fears - including others, such as that of being buried alive - at a new exhibition opening on Friday at the Science Centre Singapore.
Called Phobia²: The Science of Fear, the exhibition explores the historical and cultural significance of fear, its psychology and physiology, and how it affects people's daily lives.
The exhibition, which is meant to be a long-term display lasting up to five years, will be on daily from 10am to 6pm.
It is free, though general admission fees to the Science Centre still apply.