7. Firm, Red Lesions
If you see a firm, dull red lesion that develops a sunken center or ulcerates, see a doctor. An ulcerated area might growth another ring of tissue inside the original area or develop as a crusty patch in a different color or refuse to heal.
It may look like a pimple or boil but won’t go away. These are most likely on the face, ears and hands.
Darker skinned people may develop lesions on areas not exposed to the sun.