Cause of losing the eyebrow hair

Cause of losing the eyebrow hair

Damaging the eyebrow, due to shock, burns, electric shock, and chemical. Tropical diseases such as skin, fungal, microbial lupus, alopecia areata (Patchy hair loss). Lack of congenital growing of eyebrows.
Frequent eyebrow correction, which for a long time cause damaging the delicate root eyebrow hair due to slow growing of the eyebrow hair and weakness restoration of them, and because of that, first eyebrow becomes thin, then removed permanently.
Trichotillomania: pull out the eyebrow hair due to mental disorder.
The other disease treatment like radiotherapy, chemotherapy, removal of eyebrow tumor by surgery
Common diseases of body such as Hormonal imbalances.