What are moles?

Moles are round or oval skin growths of around 5 millimetres, formed from clusters of pigment cells
or melanocytes. They are very common, with many people having at least ten, usually on the upper
body. Moles are generally brownish or pinkish in colour, with darker moles more likely if your skin is
also darker. Some people have moles from birth, but it’s more common for them to appear during
childhood and go on forming until middle age, after which they often fade.