The causes of body hair loss after the age of 50 may be the reduction of estrogen and androgen, skin inflammation, iron deficiency anemia, hypothyroidism, and so on. 1. Reduced estrogen and androgen: many women reach the age of 50, start to enter menopause or menopause, the metabolism slows down, the function of the organs began to degenerate, resulting in the endocrine system also began to gradually degenerate, this time the ovarian function is bound to be reduced, and estrogen and androgen is also low, so there will be loss of body hair. 2. Skin inflammation: when skin inflammation occurs, the hair follicles are destroyed, thus body hair loss occurs. 3. Iron deficiency anemia: Iron deficiency anemia is characterized by weakness, pallor, dryness and loss of hair, dryness and wrinkles of the skin, etc. Iron supplementation is needed to treat the cause of the disease. 4. Hypothyroidism: When hypothyroidism occurs, its metabolic rate decreases and the hypothalamic-pituitary-thyroid axis becomes abnormal, resulting in signs such as skin flaking, low skin temperature, and thinning and drying of hair. When body hair loss occurs, it is necessary to go to the hospital to clarify the cause of the disease and actively cooperate with the doctor’s treatment.