Skin cancer generally develops in the outer layer of skin (epidermis). The three most common skin cancers are basal cell carcinoma (BBC), squamous cell carcinoma (SCC), and melanoma. Each named after the type of skin cell that appears. Generally, exposure to sunlight, ultraviolet radiation exposure, radiation therapy, is a major risk factor in this type of skin cancer, as quoted from skincareto.
In addition to the factors of radiation and sun exposure, other causes of skin cancer, including age, race, chronic wound healing, presence of moles on the body surface, the polluted environment carcinogens, and genetic syndromes.
In some countries such as Australia and New Zealand, skin cancer is a disease with a high prevalence worldwide. The case is over four times the case in the United States, Canada, and United Kingdom.