The beginning of armpit hair means the beginning of sexual maturity.
Armpit hair is formed due to the secretion of estrogen by the gonads, and the appearance of armpit hair in women means that they are beginning to enter sexual maturity. Armpit hair helps sweat to drain, protects the skin, and prevents bacteria from attacking the skin.
It is normal for girls to grow armpit hair, and there is no need to intervene too much. In addition to growing armpit hair, they may also grow pubic hair, and their breasts will develop, and they will also have their menstrual periods.
During this period of time, you should give her psychological counseling and tell her that this is a normal phenomenon to prevent the child from developing shyness and other mentalities. You should also pay attention to calcium supplement, strengthen nutrition, and rub more moisturizer on all parts of the body, otherwise swelling lines will easily appear.