Psoriasis is a chronic autoimmune skin condition that causes rapid skin cell turnover, leading to thick, scaly patches, redness, and inflammation. It is triggered by an overactive immune system and can be influenced by genetic factors, stress, infections, or environmental factors. In addition to affecting the skin, psoriasis can lead to complications such as psoriatic arthritis, which causes joint pain and stiffness, and an increased risk of cardiovascular disease. Treatment options vary based on severity and may include topical corticosteroids, vitamin D analogs, and moisturizers for mild cases, while more advanced cases may require systemic medications like biologics or oral immunosuppressants.