How can a person get skin cancer?

Sun damage and Genes: There can be a family component to many cancers including skin cancers. This should not be taken lightly. Sun exposure is another large risk factor for skin cancer. The two together can be very dangerous. If you have a strong family history, lots of sun exposure, or any enlarging skin lesions, be evaluated by your local doctor and/or dermatologist.

Exposure & genetic: The two most important factors are genetic tendencies including race and pigmentation. There are certain conditions such as basal cell nevus syndrome where the affected individual may form hundreds of skin cancers. However the next most important factor is exposure to uv radiation or carcinogens.

UV radiation: Two sources, the main is uv radiation from the sun. The other is your genes. People with fair skin and red hair are at an increased risk for skin cancer.