Psoriasis is another skin condition with a strong tendency to relapse. It is caused by genetic and immunological factors. However, bacterial and viral infections, as well as diabetes and gout, contribute to it. Disease outbreaks usually appear on the elbows, knees, buttocks, and the face and scalp. At first, these are red-brown lumps, which are then covered with silvery scales. In the place of their exfoliation, the skin becomes smooth and shiny (the so-called stearin suppository symptom). The disease also affects the nails, less often the joints (it causes inflammation and can lead to degeneration and even disability). Treatment requires special cleaning of the skin, as well as the use of anti-inflammatory drugs, steroid ointments and immunosuppressant.