Skin cancer is the uncontrolled growth of abnormal skin cells. It is the most common type of cancer and includes basal cell carcinoma, squamous cell carcinoma, and melanoma. Skin cancer can develop on any part of the body but is most frequently found on sun-exposed areas. Prevention includes sun protection, regular skin checks, and avoiding tanning beds. Treatment options vary depending on the type and stage of cancer and may include surgical excision, radiation therapy, and topical treatments.