All causes cicatricial alopecia except

Alopecia areata Alopecia literally means "loss of hair" and it could have many causes There are two types of Alopecia Noncicatricial alopecia Cicatricial alopecia Difference between cicatricial and non cicatricial alopecia Cicatricial alopecia Noncicatricial alopecia * Due to scarring * Scarring absent * Hair follicles destroyed so irreversible * Hair follicles not destroyed, so reversible * Skin shiny and follicular openings absent * Follicular opening visible * Signs of inflammation visible e.g. papules, * Absent pustules, scaling. hyperpigmentation