Other skin conditions such as warts and moles can resemble skin tags. Since some moles may be cancerous, it’s best to have your skin tags examined by a doctor. Your dermatologist or family doctor will be able to diagnose skin tags. They’ll likely do this through a visual exam. If they have any doubt about the diagnosis, they may also perform a biopsy.
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.