Psoriasis is a chronic condition where the immune system causes skin cells to grow too quickly, leading to red, flaky patches on the skin, often on the head, elbows, or knees. Its exact cause is unclear but involves both genetics and the environment. Treatment varies from creams for mild cases to pills, shots, or light therapy for more severe cases.
Psoriasis can also increase the risk of other health issues like arthritis, heart problems, and mental health concerns. Different types include plaque, guttate, pustular, inverse, and erythrodermic psoriasis, with flare-ups followed by periods of remission.