Hi, I am 18 years old and have been experiencing this for the past few days. Last night it got so uncomfortable that I had trouble sleeping.
I have been feeling a throbbing discomfort in my upper left arm, near my shoulder, and it makes my wrist feel uncomfortable as well. It comes and goes, mostly in the evening, and only lasts a short while. I am not left handed, so I don't think it's from over use of my wrist or arm. I haven't experienced any symptoms other than this, which is really leaving me stumped. Is it just a pinched nerve or something similar? I'd really appreciate the help! Thanks!