The reason why men grow beards

Beard, commonly known as beard, refers to the hair on the upper lip, chin, cheek, cheek or neck of men. If carefully distinguished, "Hu" originally refers to the hair on the corners of the mouth, while the upper lip is called "inducing wind" and "moustache", which is also called "moustache" and "Erjuan chicken" in Cantonese, the chin is called "goatee", the cheeks are called "dropping chin beard" and the cheeks are called "bearded". Men usually grow beards after puberty. Beard grows faster than hair, which is the result of androgen. The stronger the reproductive function, the faster the beard grows. Hair balls are distributed in blood vessels, more than hair roots, and it is easier to obtain nutrition. So, I just shaved my lips and it grew back in a few days. Why do men grow beards? Why do men grow beards and women don't? This is closely related to the metabolism of sex hormones in human body. Healthy men after puberty will grow beards, which are soft and thin at first, and then gradually thicken and harden. Modern medicine has found that men will secrete more androgen at this time, making their hair dark and thick. The appearance of beard is a typical performance. Women's androgen was absolutely dominant at that time, and the amount of androgen was very small, which was far less than that of men. In contrast, their hair is thinner and lighter. So women don't have thick and hard black beards. Some women also grow beards in adolescence, which is very troublesome and embarrassing. In fact, this is not a beard, but there is more hair around the mouth, which will not affect your health. Generally, after puberty, it will disappear on its own. In the process of male voice change, male vocal cords will change around 13 years old, because a lot of development has been completed before 13 years old. When a man reaches 65, his voice will become louder and louder.