Moles vary in size, shape and pigmentation. While many are harmless, some can develop into melanoma, a form of skin cancer. People who have a large number of moles tend to have a greater chance of this occurring. Knowing the warning signs of problem moles is the first step to making sure you stay healthy. If you have a mole that has “The Ugly Duckling Sign” (asymmetrical, ragged around the edges and/or larger than six millimeters) you may want to consult your doctor.

In addition, if your mole has a red, blue or white hue, it may be a problem mole. If your mole changes in shape, color or size over time, consult your doctor. For suspect moles, your doctor will perform a skin examination and will monitor the mole for any abnormalities. If your mole is found to be cancerous, your doctor will remove it as a safety measure and will suggest regular testing to make sure that the cancer does not recur or spread.