Every so often, my upper arm starts twitching, not the bicep- but the area under the arm from the pit to the elbow. It continues for about 3 or 4 mins. I am usually relaxed watching TV, but it has happened in bed too.
I also get a lot of scalp itching in the back above the nape of my neck along the scalp ridge line. Only thing that calms it is cortisone anti-itch cream.