Hello, I am a 22 year old male with no past health problems, a reasonable diet & I get a moderate amount of activity in each day. I'm not on any medications, either. Here's the problem: Last night about 10 P.M I starting having a very faint tingling feeling in the middle of my left arm that hasn't gone away. My heart rate is normal, I have no chest pain & can breathe easily as I normally do. I am also healthy enough for sexual activity. I had a 20 minute session this morning with no problems. So I guess my question is what is wrong with my arm? My mom said it was probably just a pulled muscle or a twitch. Can anyone here offer help? Thank you.