I have this type of sensation all the time. Sometimes it feels like bugs, but most of the time it is more like a coarsing energy. I've done alot of meditaton and energy therapies through the years and wondered if that had anything do with it. I''ve done alot of Reiki work as well. One thing I have noticed is that since stopping Lamictal and Trileptal about 4 months agol the sensations have gotten more intense and noticeable. Sometimes it feels like my body is vibrating like I've stuck my finger in a electrical socket. It does right now.