Skin cancers are cancers that develop from the skin. They are due to the progression of abnormal cells that can invade or spread to other parts of the body. Skin cancer is the most common form of cancer, globally accounting for at least 40% of cases. The most common type is non-melanoma skin cancer, which happens in at least 2-3 million people per year. There are three main types of skin cancers: basal-cell skin cancer (BCC), squamous-cell skin cancer (SCC) and melanoma. The lymphomas that start in the skin are called skin lymphoma. surgical excision is the most common form of treatment for skin cancers. About 90 percent of nonmelanoma skin cancers are assisted with exposure to ultraviolet (UV) radiation from the sun. Sunscreen is effective and thus recommended to avert melanoma and squamous-cell carcinoma.