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Alopecia is hair loss that can be caused by heredity, aging, disease, medications or lifestyle. The timing and course of hair loss can provide clues to its cause.For example, hair loss that comes on suddenly may be attributed to illness, diet, or medical treatments, such as chemotherapy or radiation.nother cause of hair loss is a condition called cicatricial alopecia, in which the hair follicles that produce hair are destroyed. Hair loss can be experienced by people with certain types of anemia, anorexia, and thyroid disease.
About Alopecia Areata. Alopecia areata is considered an autoimmune disease, in which the immune system, which is designed to protect the body from foreign invaders such as viruses and bacteria, mistakenly attacks the hair follicles, the structures from which hairs grow.This can lead to hair loss on the scalp and elsewhere.lopecia Areata Totalis. The total loss of hair on the scalp. Alopecia Areata Universalis. The loss of all hair from the head and the body. Autoimmune Disease. Disease that results when the immune system mistakenly attacks the body's own tissues.