These'signals' from your skin are nerve ending tics and twitches, the primary cause for this is medication side effects including and often the overdosing and buildup of vitamins in your body. Reduce your vitamin intake to just one or two tablets per week, (ignore the packets instructions) drink more fluids meaning water, and monitor 'your unwanted symptoms". Beware of iron-zinc vitamins and do not think if one tablet is good for you then 3 must be better. And do not purchase ONE VITAMIN ONLY TABLETS, these are the one you will take more of, and will over-dose on, so stick with multi-vitamins.