Unusual moles, sores, lumps, blemishes, markings, or changes in the way an area of the skin looks or feels may be a sign of melanoma or another type of skin cancer, or a warning that it might occur.
A normal mole is usually an evenly colored brown, tan, or black spot on the skin. It can be either flat or raised. It can be round or oval. Moles are generally less than 6 millimeters (about ¼ inch) across (about the width of a pencil eraser). Some moles can be present at birth, but most appear during childhood or young adulthood. New moles that appear later in life should be checked by a doctor.Once a mole has developed, it will usually stay the same size, shape, and color for many years. Some moles may eventually fade away.
Most people have moles, and almost all moles are harmless. But it’s important to recognize changes in a mole – such as in its size, shape, or color – that can suggest a melanoma may be developing.