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Home Disease Index Moles

MOLES


Overview

Causes
Symptoms
Therapy
Risk Factor

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Overview

 

A mole (or melanocytic naevus) is an abnormal collection of pigment cells present within the skin. These cells are known as melanocytes. Moles are extremely common. Most people are born with a few moles and develop others during their lives.




Causes

 

Most moles are simply the result of a harmless proliferation of the pigment cells within the deeper layer of the skin. A few of these moles, called congenital melanonaevi, are usually present at birth. But most develop spontaneously or are caused by exposure to sunlight and tend to appear on those areas of the skin that catch the most sunlight. Most of these moles appear during the first 20 years of life, although they may continue to develop into the 30s and 40s. However, the majority disappear with age.

 



Symptoms

 
  • The mole is itchy and painful.
  • Increased size or an increasingly irregular appearance, especially at the edges.
  • A change in colour, particularly if the mole gets darker or becomes mottled.
  • Spontaneously bleeding.
  • Satellite pigmented lesions.

 

Risk Factors

 
The presence of moles will not cause you serious problems. But large numbers, more than 25, are an indication of susceptibility to melanoma. So you should take great care about exposure to sunlight. If there is a family history of malignant melanoma, you should be particularly vigilant about changing moles.

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