What Is Psoriasis of the Nail?
Psoriasis is a chronic, immunologic skin condition that affects the skin and joints. In psoriasis, the skin makes new skin cells at a rapid rate, much faster than normal; skin cells build up and cause lesions to form. According to the Psoriasis Net website, approximately 50 percent of psoriasis sufferers have psoriatic changes that affect fingernails and toenails.