Moles are clusters of pigmented cells which typically pose no threat when stable and symmetrical. However, when a mole changes shape, color, or size—or worse, itches, bleeds, or crusts over—it could be an indication of melanoma or another type of skin cancer. Early detection is critical for successful treatment.

The ABCDE Rule for Identifying Suspicious Moles

In order to help distinguish between harmless moles and those worth investigating, dermatologists recommend the ABCDE rule :