My mother picks at her skin (mainly her arm's) until she has caused herself to bleed. She has caused deep scars on her arms from this. I have been keeping her nails clipped short as possible, I also bandage her arms, but she takes the bandage off as soon as I put it on. She just can't stop digging into her skin. Also, she constantly pulls at her tongue until it becomes raw. I try everything to distract her, but she goes right back to pulling and scratching. Any ideas?