Mole mapping is a diagnostic technique that incorporates the use of images to monitor changes in the skin over time. Physicians will reference previous mole map images to confirm whether there have been changes in size, color, or border shape of existing moles, and to determine whether any new moles have developed since your last appointment. People who have an above average number of moles on their body (over 50) should have their physician regularly examine their body for changes to existing moles or potential new growths that might otherwise go unnoticed.