The loss of pubic hair is caused by the normal metabolism of the body and is influenced by sex hormones. Pubic hair grows thicker during puberty, but gradually becomes sparse as we grow older. If there are no special abnormal symptoms, it is normal to lose, and as we grow older, the secretion of sex hormones gradually decreases. Before and after menopause, the pubic hair will fall out more and faster, which is normal. However, if it is caused by diseases, such as pituitary lactinoma, hypothyroidism, female menopause syndrome, anterior pituitary hypofunction, etc., it will lead to pubic hair loss, which is pathological. You need to go to the hospital to do the relevant examination and laboratory tests, and do further symptomatic treatment for the examination results and related diseases. During the treatment period, you should ensure sufficient sleep, appropriate activities and strengthen nutrition.