Picking at your skin. We’re not just talking about picking one or two itchy scabs from your skin. Dermatillomania, the medical term for excessive skin picking, is actually a result of human evolution. Prehistoric humans needed to pick ticks, mites, and fleas off their skin. In some modern people, that instinct becomes hard to control, even if there isn’t a single flea to be found. People with the condition become obsessed with plucking out skin imperfections when they experience stress. Many spend hours with the habit. People who find themselves spending an inordinate amount of time picking their skin should get proper help.