I have occasional instances of twitches primarily in my legs, but can happen anywhere on my skin. These begin with a slight feeling of an itch almost like an insect bite, which then causes a twitch. and a muscle reaction. these can happen any where on the skin. And, no I don t think I have an infestation of lice. It is more like nerve happening . though not continuous, it s more at random. nonetheless annoying! thank you , JB