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Why does hair grow out of a mole?

Moles can develop at any time in your life, and although some contain no hair, some do. Hair growing from a mole is not dangerous, and mainly tends to be more of a cosmetic nuisance than a health problem. The most important thing to do is to have the mole checked if you notice its changing in size, shape, or colour, but the hair itself causes no problems.

Hair in Moles

Moles that appear on areas of the skin that contain hair follicles such as the arms, legs, scalp, genitals, and eyebrows, may have hair that grow out of the mole itself. The growth of hair is due to the location of the mole.

Location

Moles with hair can appear on any part of the body, and in a range of colours, although most are dark brown or black.

Appearance

Moles with hair in them can appear as round black heaped up moles with one or more hairs growing from them, or flat moles with hair growing from them.

Are They Dangerous?

Hair growing from moles is actually a good sign. It indicates that the mole may not be cancerous, because malignant moles do not grow hair. This is due to the cancerous cells destroying the hair follicles.

Fact

Moles that are present at birth called giant hair nevi or congenital nevi, may increase your chance of developing malignant melanoma.This risk is not applicable to adults who's mole grows hair later in adulthood.

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About the Author

April Khan is a medical journalist who began writing in 2005. She has contributed to publications such as "BBC Focus." In 2012, Khan received her Doctor of Public Health from the University of Medicine and Dentistry of New Jersey. She also holds an Associate of Arts from the Art Institute of Dallas and a Master of Science in international health from University College London.