When I get a big unexpected fright, my armpits get a sore tingly and itchy sensation?

Question

Why does this happen? It only happens at the moment I get the fright. Almost, if not simutaneously.

Answer 1

Your nervous system is reacting to the stress by causing the sensations in your arm pits. it similar to when people get goose bumps when they are frightened. People react to fear in different ways. This is your way.