The number of pubic hair of men and women is often an important index to judge diseases. There is a great difference in pubic hair between men and women. Generally speaking, women have less body hair than men. Female pubic hair generally appears in the early stage of breast development, first at the labia majora, and then develops to the pubic mound triangle, and its pubic hair distribution is inverted triangle. Axillary hair grows after pubic hair appears and before menarche.

Too little or too much pubic hair is mainly manifested in women. Normal women have less body hair, most of which is physiological, and there is no important pathological change in their bodies, which has no impact on their health. Hypopubic hair is a pathological condition of a few women. There is a genetic disease called Nessler's syndrome, which is caused by abnormal sex chromosomes and often has little pubic hair. This female patient has gonadal insufficiency, short stature, stunted breasts, naive vulva and genitals, almost no pubic hair on the pubic mound, amenorrhea and no fertility. Some women have low thyroid function, often without armpit hair and little pubic hair, which leads to low sexual desire. Some women also have postpartum hemorrhage, pituitary ischemia, pituitary insufficiency, amenorrhea infertility, emaciation, weakness, loss of libido, hair and pubic hair loss, and less pubic hair.

When men and women have less pubic hair or pubic hair falls off, they should go to the hospital for examination in time. Some young men also have little or no pubic hair, often no Adam's apple, high pitch and no sperm in semen, which is caused by congenital testicular hypoplasia or small testicular disease. Men with the above symptoms should go to the hospital for chromosome examination as soon as possible to determine the cause.

Some women suffer from hirsutism, which is usually a symbol of disease. Women with eosinophilic or basophilic pituitary adenomas usually have hairy genitals. The former finger sausage-like, gum thickening, tongue enlargement, gonadal dysfunction; The latter has a full moon face, a bulging belly and rough skin with amenorrhea and high blood pressure. In women with adrenal hyperplasia and tumor, excessive androgen secretion leads to excessive pubic hair, clitoral hypertrophy. Polycystic ovarian syndrome can also appear hirsutism, which is characterized by not much at the beginning, amenorrhea, scanty menstruation, obesity, and obvious increase in pubic hair and body hair after infertility. In addition, there are hereditary hirsutism, drug-induced hirsutism and neuroticism, which should be checked and diagnosed in time.