Hey, I m 22,6 1, 230 Black male. I have been experiencing twitching in my left arm and neck today (started last night). I have had a nervous habit in my legs for as long as I can remember. Also, I yawn and stretch very frequently. I lift weights fairly frequently. Also, arms and legs get tingly sometimes. I m thinking it can be anxiety because it kind of started after I read an article about ALS. Any suggestions?