Here are some examples:
* He winced as the doctor poked his injured knee. (This shows a physical reaction to pain.)
* She winced at the sight of the blood. (This shows a physical reaction to something unpleasant.)
"Wince" is usually used to describe a quick, involuntary movement made in response to pain or discomfort.
If you're looking for a synonym for "wince" that might be more applicable in other contexts, consider using words like:
* Cringe
* Grimace
* Flinch
* Shudder
These words can all be used to describe reactions to unpleasant or uncomfortable situations.