When I'm nervous/embarrassed/ uncomfortable in any way, my neck chest & shoulder, upper arm area goes bright red and blotchy. It feels burning hot and it puts me in a viscous cycle of then feeling more embarrassed because people can see my neck going bright red. It's awful and causes me to feel awkward in social situations. What is this and can I fix it. I've lived with this for long enough, I just want it to stop! Please help.