There are three major types of skin cancer. These include:
Basal cell carcinoma: Basal cell carcinoma is a type of skin cancer that usually occurs in people who have fair skin. It appears as a slightly transparent bump on the skin and on areas of the skin that are exposed to the sun such as your head and neck.
Squamous cell carcinoma: Squamous cell carcinoma develops in the squamous cells that make up the middle and outer layers of the skin, as per Mayo Clinic. This type of skin cancer is characterized by a red firm bump, scaly patch, or a sore that heals and then reopens.
Melanoma: Melanoma is the most serious kind of skin cancer that develops in the melanocytes, the cell that produces melanin. It can develop within a mole or appear suddenly on your skin as a dark spot.
Other types of skin cancers include: cutaneous T-cell lymphoma, dermatofibrosarcoma protuberans (DFSP), merkel cell carcinoma, sebaceous carcinoma.