Squamous cell carcinoma (SCC) is a type of skin cancer that arises from squamous cells, which are flat cells found in the outer layer of the skin. It often develops in areas exposed to the sun, such as the face, ears, and neck, but can also occur in other parts of the body, including the lungs and mouth. SCC is usually caused by prolonged sun exposure, but other factors like smoking and certain chemicals can also increase risk. SCC typically appears as a firm, red bump, a scaly patch, or a sore that doesn't heal. While it can be aggressive and spread to other tissues if not treated, early detection and treatment often lead to a good prognosis. Treatment options include surgery, radiation therapy, and topical medications, depending on the size and location of the tumor.