My father is 80 years old and has Alzheimer's. When not busy tends to scratch up the face and head. He has clear and fragile skin, so wounds easily occur. What in his case is more serious because it's that he is also are diabetic. We have found that the fact that the facial hair (nose, ears, eyebrows, beard) and nails are grown slightly, substantially increased the frequency sometimes almost obsessive behavior; as well as other less frequent but more physically onerous, like scratching the genitals; or least burdensome as clean nails.