The Mole (skin marking) reference article from the English Wikipedia on 24-Jul-2004
(provided by Fixed Reference: snapshots of Wikipedia from wikipedia.org)

Mole (skin marking)

Helping orphans the way you would do it
A mole is a small spot of darkened pigment on the skin, which forms where there is a high concentration of melanin.

Moles are usually circular or oval and not very large. Some children are born with moles, and almost everyone has at least one or two moles on their bodies.

Sudden and unexpected changes in skin moles (e.g. bleeding, irritation, darkening, sudden growth) can be a sign of skin cancer so they need to be watched carefully. If a mole appears suspicious, it can be biopsied and checked for signs of malignancy.