Alopecia refers to hair loss in areas of skin that normally have hair. There are two forms of alopecia scarring and non-scarring.
Scarring is the loss of hair follicles. This form causes permanent hair loss. The most prevalent forms of scarring alopecia are:
- Cutaneous lupus erythematous
- Central centrifugal cicatricial alopecia
- Fungal kerions
In the case of non-scarring, the hair shaft is gone, but the follicles are still present. It often is reversible. It can also develop into the scarring type. Non-scarring types include:
- Androgenetic (hereditary) alopecia
- Telogen effluvium
- Alopecia areata is an autoimmune process; the cause is not known
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