Does skin cancer always start from a mole?

Skin Cancer and Mole: There are different types of skin cancer. A melanoma is a skin cancer that can start from a mole. The signs that a mole is cancerous could be a change in symmetry, shape, size, or color. Basal cell skin cancer and squamous cell skin cancer do not start from moles. All types of skin cancer are thought to increase in incidence with more exposure to ultraviolet radiation.

Skin cancer : Malignant melanoma may develop from a preexisting mole or on "normal" skin. Other skin cancers such as basal cell or squamous cell skin cancer do not develop from preexisting moles . See a dermatologist for a skin cancer screening.