Moles are usually small brown spots or skin patches that are present on the epidermis or on a deeper layer of skin, that is the dermis.
Some moles are present from birth (relatives), while others develop during the first decades of life (acquired mole).
Moles can be found anywhere on the body, they may be either flat or obtuse and usually have a round or spheroidal shape but are more common in parts of the body exposed to sunlight.
The number and type of them are dependent on hereditary factors.