Skin picking or scratching is a common behaviour seen in people with Prader-Willi Syndrome (PWS). The intensity and duration of this behaviour varies from person to person and episode to episode. It may occur in the form of scratching an insect bite until it bleeds and becomes an infected sore or it may manifest in the form of nose picking or anal picking. When this behaviour continues for a prolonged period it can cause unsightly and distressing open wounds. 75% of the people surveyed by FamCare reported skin picking in their relative with PWS. A USA study reported anal picking in 9.5 % of people who skin picked.