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Alopecia
What are the symptoms?
Male Balding
During male balding there is a gradual shortening of the growth period of the hair, so hairs will not grow as long, and a delay in the replacement of the hair after the old hair falls out. Eventually the hair follicles shrink, a process called miniaturisation, so that the hair becomes finer as well as shorter. Finally when the follicle gets too small, no hair grows.
Female Pattern Hair Loss
Female pattern hair loss can start at any age from early teens onward. The hair becomes gradually thinner, making it easier to see the scalp. Thinning usually affects the front and top of the scalp but it can be all over the scalp. In most women the frontal hairline does not recede, unlike male balding.
Alopecia Areata
The main feature of AA is the development of one or more bald patches on the scalp about the size of a large coin. Individuals with AA may also experience any of the following:
In most people the hair grows back but in some cases new patches of hair loss develop before hair grows back on old areas. Sometimes bald patches overlap and merge into larger areas. Almost all people who have a bout of AA will get it again, though episodes of hair loss may be many years apart.
Background
| What are the causes? 
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