10 Signs of Skin Cancer

5. Pigmented Patches, Domes, or Bumps

The most common sign of skin cancer is a change on the skin. A new patch resembling a mole may not be a mole at all, but a melanoma. The edges of a problematic patch will likely be less defined and appear more ragged. The coloring may be uneven, usually in varying shades of brown, tan, white, black, or blue.

Normal moles are mostly symmetrical, while skin cancer patches are asymmetrical. Check existing moles regularly for changes, especially if you have a skin type more at risk for skin cancer, and do monthly skin exams to look for new marks. While it's not necessary to panic at every new spot, some people find it helpful to record the size and shape of potentially problematic marks so it's easier to track any changes over time.