Hair loss

A case of mid-frontal baldness: Andre Agassi

The port-wine stain of Mikhail Gorbachev (pictured here with Ronald Reagan) would have remained unknown if he had not been bald.

General Douglas MacArthur wearing a comb over.

Hair loss, also known as alopecia or baldness, refers to a loss of hair from the head or body. Baldness can refer to general hair loss or male pattern hair loss.

Hair loss and hypotrichosis have many causes including androgenetic alopecia, fungal infection, trauma (e.g., due to (trichotillomania), radiotherapy, chemotherapy, nutritional deficiencies (e.g., iron deficiency), and autoimmune diseases (e.g., alopecia areata). Hair loss severity occurs across a spectrum with extreme examples including alopecia totalis (total loss of hair on the head) and alopecia universalis (total loss of all hair on the head and body).

单词	Congenital alopecia
释义	Congenital alopecia 英语百科 Hair loss Hair loss, also known as alopecia or baldness, refers to a loss of hair from the head or body. Baldness can refer to general hair loss or male pattern hair loss. Hair loss and hypotrichosis have many causes including androgenetic alopecia, fungal infection, trauma (e.g., due to (trichotillomania), radiotherapy, chemotherapy, nutritional deficiencies (e.g., iron deficiency), and autoimmune diseases (e.g., alopecia areata). Hair loss severity occurs across a spectrum with extreme examples including alopecia totalis (total loss of hair on the head) and alopecia universalis (total loss of all hair on the head and body).
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Congenital alopecia

Hair loss