Moles are brown or black growths, usually round or oval, that can appear anywhere on the skin. They can be rough or smooth, flat or raised, single or in multiples. They occur when cells that are responsible for skin pigmentation grow in clusters instead of being spread out across the skin. Generally, moles are less than one-quarter inch in size.
Most moles are harmless, but a change in size, shape, color or texture could be indicative of a cancerous growth. Moles that have a higher-than-average chance of becoming cancerous include:
Higher frequency of moles
People with 50 or more moles are at a greater risk for developing a skin cancer.
In some cases, abnormal moles may become painful, itchy, scaly or bleed. It’s important to perform regular checks on your moles to ensure they do not change. We recommend doing a visual check of your body monthly, including all areas that don’t have sun exposure (such as the scalp, armpits or bottoms of feet).
Use the American Academy of Dermatology’s ABCDEs as a guide for assessing whether or not a mole may be becoming cancerous:
Asymmetry: Half the mole does not match the other half in size, shape or color.
Border: The edges of moles are irregular, scalloped, or poorly defined.
Color: The mole is not the same color throughout.
Diameter: The mole is usually greater than 6 millimeters when diagnosed, but may also be smaller.
Evolving: A mole or skin lesion that is different from the rest, or changes in size, shape, or color.
If any of these conditions occur, please make an appointment to see one of our dermatologists right away. The doctor may do a biopsy of the mole to determine if it is or isn’t cancerous and/or may surgically remove it.