Basal cell carcinoma is a type of skin cancer. Basal cell carcinoma begins in the skin cells called basal cells. The basal cells make new skin cells as old ones die off.

Basal cell carcinoma often looks like a slightly transparent bump on the skin, though it can take other forms. Basal cell carcinoma occurs most often on areas of the skin that get a lot of sun, such as the face and neck.

Most basal cell carcinomas are caused by exposure to light from the sun. Using sunscreen and other sun protection methods can help lower your chances of getting basal cell carcinoma. (https://www.mayoclinic.org/diseases-conditions/basal-cell-carcinoma/symptoms-causes/syc-20354187)