The causes of loss of armpit hair at the age of 60 include physiological causes, baldness and exposure to chemicals. 1. Physiological reasons: For middle-aged and elderly people, especially women, the loss of body hair, such as armpit hair or pubic hair, is most likely due to the gradual failure of ovarian function, the body’s hormones, especially androgen secretion began to decrease and cause, which is a normal physiological situation. 2. Patch Baldness: Patch Baldness is a psychogenic, autoimmune-associated, non-scarring hair loss disease that can occur on any part of the body. It can also lead to loss of armpit hair at the age of 60. 3. Exposure to chemicals: Improper use of some chemicals may also lead to loss of armpit hair. There may be other reasons for the disappearance of armpit hair at the age of 60, so it is recommended to visit the hospital to find out the reasons.