Diseases that can cause this symptom:
Psoriasis is a chronic inflammatory, hereditary skin disease that can be provoked by internal and external triggers. This disease can occur at any age but often manifests itself for the first time during puberty or at between the age of 40 to 50. Normally the first layer of skin renews itself within 28 days, but for psoriatic patients, this only takes three to four days. The course of psoriasis varies but appears mostly in phases with inflammatory, reddened, scaly skin areas that often itch and burn. When carefully scraping off a scale, a thin skin remains underneath and if one also loosens this, the spot bleeds lightly. The areas where the skin changes most often include the hairy scalp and the areas behind the ears, elbows, knees and the region around the sacrum.