I have psoriasis on my elbows and head. I used to bite my nails, but stopped so I could have long nails for my wedding in April. The problem with quitting one bad habit is that a new bad habit formed. I now pick at the dry skin on my scalp from the psoriasis. I seriously don't know how to stop. If I don't pick at my scalp, I bite my nails. I don't know which is the lesser of the 2 evils. Can anyone help?