Why do some men still don’t have beards after reaching a certain age?

　　Growing a beard is a manifestation of male secondary sexual characteristics. The appearance of secondary sexual characteristics is triggered by the androgens secreted by the testicles after a man enters puberty. boy Before the age of 11, children have very little androgen in their bodies, and there is not much difference in physical signs between men and women. There is no strict time limit for pubertal development in boys, usually between the ages of 10 and 14.

　　After entering puberty, the first sign is the enlargement of the testicles and scrotum. As the testicles gradually mature, they begin to produce sperm and androgenic capabilities. Under the influence of androgens, male genitals develop rapidly, and secondary sexual characteristics appear, such as strong body shape, well-developed muscles, wide shoulders and small hips, long facial hair, a bulging Adam's apple, and a deep voice. Beard growth in men is the result of the effects of androgens. There is also a process for the emergence and shaping of men's beard. Only when puberty is over and sexual maturity occurs, and the androgen in a man's body reaches normal adult levels, will the beard grow and look like an adult.

　　Body healthy The androgen levels in the body of men are generally the same, but the amount of beard varies greatly among men. Some people have thick beards, some have sparse beards ； Some people have beards, and some people have goatees. These are normal differences. The size and shape of beards are related to ethnicity and family inheritance. This is normal and there is no need to worry about it at all.

　　Whether a man's lack of beard is pathological should be judged in relation to the development of his entire body. If a man has no beard, but his reproductive organs and the secondary sexual characteristics mentioned above are developing normally, it is not pathological. The starting age for boys' beard growth is not exactly the same. Some are a few years earlier and some are a few years later. They are all normal and there is no need to worry. If you have entered puberty and have neither grown a beard nor obvious secondary sexual characteristics, or even have not developed after puberty, this should be considered an abnormality. It may be that there is a problem with the gonadotropins that specifically regulate and control the secretion of sex hormones. You need to go to the hospital. Hospital Get checked and treated.