Psoriasis is a skin disease that causes scaling and inflammation (pain, swelling, heat, and redness). Anyone can get psoriasis, but it occurs more often in adults. In many cases, there is a family history of psoriasis. Certain genes have been linked to the disease. Men and women get psoriasis at about the same rate. By selecting "Learn More", you will be directed to the NIAM National Institutes of Health website.