Q: I have this strange feeling in my upper arm/shoulder area. It feels like something "poping" under my skin when I am just sitting still. It does hurt but I can just feel the muscles kind of poping even when I am not necessarily using my arm. I meant to say it doesn't hurt ....just a weird feeling with the "poping" feeling.Yes, it does feel like the muscles are contracting a bit....but its strange how it happens when I am just sitting still.
A: just random muscle contractions. should be fine.