If you see any changes in the skin, such as a growth, a sore that doesn't heal, or moles that are starting to look irregular, consult your dermatologist immediately. And if a family member has had melanoma or you have a high number of moles, Dr. Houghton suggests seeing a dermatologist once or twice a year. Melanoma usually begins as a dark brown or black patch with irregular borders and is characterized by the uncontrolled growth of pigment-producing tanning cells. It may appear anywhere on the body without warning or start near a mole. It has a tendency to spread, making it essential to treat it right away.
Most melanomas start in normal skin, as small brown or black marks on the skin.
They are sometimes hard to distinguish from ordinary moles. About a third develop in existing moles. Change in colour - the mole may develop a reddish edge. It may become darker or appear to have different shades of colour, usually a mixture of brown and black. They can also be red, due to inflammation, or have a blue-white tinge due to partial clearing in the centre of the melanoma.