Mexican mole (pronounced MO-lay) can seem intentionally bewildering, but the word actually has a very simple definition. Mole means sauce in the historic Nahuatl language spoken by the Aztecs, which ...

A mole is a colored spot on your skin caused by a high concentration of pigment-producing cells called melanocytes. The medical term for a pigmented mole is a melanocytic nevus, or simply nevus.

Moles form on your skin when clusters of melanocytes, or pigmented skin cells, grow in small, concentrated areas. They usually appear as colored bumps or spots that vary in shape and size and are ...