Moles are seen on the skin in every person. At birth they are not seen right away and they vary from person to another. The moles sometimes appear when the person reaches the age of 2 and up but generally they appear during the first twenty years, and they gradually become bigger although generally the size varies from person to person.

The moles are known in medical term as nevi and they form clusters on the skin. They sometimes appear dark brown in color while others are black but generally they have different colors from one person to another. Not all moles on the skin have uniform colors; they can either be black, brown or lighter and the sizes vary too.

Generally the moles are harmless but in some cases they can be very dangerous as they can lead to cancer. Monitoring all the moles is necessary so that the person will know if they are cancerous or not. Not all the tumors of the skin are developed from the pre-existing moles although some begin from near or some other dark spots.

Some moles have hairs on them or sometimes others are wrinkled, mostly the larger ones have wrinkles. If there are any changes in the moles like itchiness, pain or bleeding, it is recommendable to consult a doctor, specifically a dermatologist.

People are also given the option to remove their moles. To cancerous moles they are highly needed to be removed because they will multiply on the skin. Another reason would be to simply remove them from the face. Others only remove moles that are already very large while others completely remove all the moles that can be found in the skin.

The causes of the development of moles vary too. Others are genetically inherited while others are developed from the exposure from the sunlight. The hereditary moles are highly to attract cancerous moles which mean melanoma. Dysplastic nevi are a hereditary condition too that are unlikely to develop cancer and they are normally common amongst people. If a normal mole exceeds 50 then there is a high risk of the development of melanoma which is a serious skin cancer disease. The exposure from sunlight causes an aging and damage to the skin which can also develop into melanoma. According to the hypothesis of scientists, the overexposure of the skin from the UV rays can also lead to the development of moles although there is still much to discover in order to support this claim.