squeaming

verb (used without object), squeamed, squeaminig.
1. to wriggle, writhe , cringe, or curl your toes in disgust
2. to feel or display discomfort, distress, or disgust, embarrassment, pain, etc.:

noun
3. the act of being squeamish; a squeaming or wriggling movement.

He was seen squeaming whilst watching the surgeon cut into the patients brain.