Whether leg hair can shed automatically has little to do with age, leg hair belongs to a type of human hair, and its growth and metabolism will have a cycle, and leg hair will show partial shedding and growth during this cycle. If leg hair appears unnatural shedding, the first thing to consider is whether it is due to tight pants and other reasons, resulting in excessive friction on the legs, thus causing the shedding of leg hair. In addition, the automatic shedding of leg hair may also be related to androgen synthesis reduction, lower thyroid function, micronutrient deficiency, skin infection and other factors. 1, androgen synthesis reduction: mainly including various causes of hypogonadism, adrenal cortex and ovarian hypogonadism, androgen synthesis and secretion reduction may lead to palpitations, insomnia, hypogonadism, sleep disorders and other symptoms, and also It may also lead to the loss of leg hair and other phenomena. You can take appropriate androgen supplements as prescribed by your doctor, and you should also pay attention to a light diet and adjust your emotions. 2. Decreased thyroid function: When thyroid function decreases, you may experience pallor, swelling, dry skin, etc., and leg hair and hair loss, with the outer 1/3 of the eyebrows falling out more commonly. 3, lack of trace elements: lack of trace elements can also lead to leg hair loss, such as zinc and calcium deficiency, may lead to growth retardation, anorexia, hair yellowing and loss, etc., it is recommended to detect the body needs of trace elements, and follow medical advice to supplement, can effectively alleviate the phenomenon of leg hair loss; 4, skin infection: when the leg fungal infection, seborrheic dermatitis, folliculitis, etc. Dermatitis, folliculitis, etc., if the inflammatory reaction of the infection is more intense, may form abscesses or sinus tracts, with the appearance of scarring may also cause the situation of leg hair loss. It is recommended that if itching and small abscess formation occur, go to the hospital to identify the specific cause and carry out targeted treatment according to the cause.