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Baldness

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Alopecia
Classification and external resources
Man displaying male pattern baldness
ICD-10L65.9
ICD-9704.0
DiseasesDB14765
MeSHD000505

Baldness (also known as alopecia) is when someone has no hair on his or her head. Sometimes this is inherited from parents or grandparents, or it can be done on purpose if somebody cuts off all their hair off. Some monks or South Korean soldiers in the army do this.

Baldness is most often caused by a medical condition known as androgenic alopecia. This is found in humans, as well as in some animals. When it occurs, it will mean that those affected will permanently lose some (or all) of their hair. Since some of the factors are linked to the genes on the chromosome, the condition can be seen more often with men, than with women.

Total hair loss

Alopecia totalis is the loss of all head hair. Its cause is believed to be autoimmune, but many with the disorder lead relatively low stress lives.

Alopecia areata (AA) is a condition in which hair is lost from some or all areas of the body, usually from the scalp.[1][2] Because it causes bald spots on the scalp, especially in the first stages, it is sometimes called spot baldness.

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