There are two main types of skin cancer: Melanoma and non-Melanoma.
Melanoma: The most serious kind of skin cancer in the world. Melanoma develops from skin cells called Melanocytes. These are found in the deeper layers of the skin and produce a protein called melanin. Melanin protects the skin by absorbing harmful ultraviolet (UV) radiation.
There are the same number of melanocytes in dark and fair skin, but the melanocytes in darker skin produce more melanin. People from ethnic groups with naturally darker skin have more protection against UV radiation and so are less likely to get skin cancers, including melanoma.
Non-melanoma: Skin cancers are far more common than melanoma. However, they tend to be less serious than melanoma (as long as they are treated).