What're the first signs of skin cancer?

Hard to say.: There are at least five major types of skin cancer: basal cell carcinoma, squamous cell carcinoma, melanoma, cutaneous t-cell lymphoma and merkel cell carcinoma. Each has its characteristic appearance. Let your dermatologist tell you.

Enlarging skin bumps: They can take a variety of different appearances depending on what type of cancer. Melanoma is the most aggressive, see the pic i attached. Squamous cells are scaly and can ulcerate if large. Basal cells are "pearly" and also can ulcerate and bleed. If you have concern for an enlarging spot on your skin, have it looked at by your md or dermatologist for evaluation and possible biopsy (in office.

ABCD's: Remember your abcd's when thinking of melanoma. Look for moles with asymmetry boarders that are irregular color differences within the same mole diameter greater than 6mm also any new mole or old that starts to itch, bleed or ulcerate should be of concern. Another rule is the ugly duckling rule. Which refers to a mole that looks distantly different from the others on your body.