Doctors remove many moles every day, but there is always one recurring theme that dermatologists tell people: Be aware of your body and any moles that have changed over time. This is especially true for moles that are dark or flat. Invariably, people will see doctors and be extremely concerned about raised, lightly colored moles, but they are not concerned about the dark, black melanoma (skin cancer) next to the mole. This is truly important.
Your dermatologist may become concerned if one of your moles has changed shape or color, as this may be an indicator of skin cancer. Most moles are less than a ¼-inch in size, so any mole that is larger should be checked by your doctor. Identifying and treating skin cancers early helps avoid spreading of the cancerous cells to other parts of the body. Uncommon moles, also called dysplastic nevi, may: