Male eyebrow hair loss may be physiological reasons or pathological reasons, such as baldness, folliculitis and so on. 1. Physiological reasons: hairs go through periods of growth, regression and rest. When the hairs enter the regression and resting period, the hairs will fall off. Every day there are hairs that enter the line, resting period, so every day there are eyebrows fall off. 2. Pathologic causes: Patchy baldness: it may be related to heredity, depression, autoimmune and other factors, causing the destruction of the hair follicle structure, resulting in abnormal hair growth and other conditions. The situation of losing eyebrow hair can also occur. Folliculitis: when there is an infection in the localized follicle of the eyebrow, the inflammation can lead to red papules around the follicle. Sometimes pus, itching and pain can occur, leading to localized damage to the hair follicles, which can also lead to localized eyebrow hair loss. When male eyebrow hair loss occurs, if the situation persists and is more serious it is recommended to go to a regular medical institution in time, follow the doctor’s instructions to choose the appropriate examination, with the help of the doctor to clarify the cause, targeted treatment or therapy.