The girl's hair is heavy.

What is the cause of heavy hair? Common reasons for women's thick hair are as follows:

1. Adrenal cortical hyperplasia: It is caused by excessive androgen secretion by cortical cells, which mostly occurs after puberty.

2. Pituitary tumor: It can be caused by tumor cells secreting too much adrenocorticotropic hormone to stimulate the adrenal gland, but this disease causes less hirsutism.

3. The reason why women's hair is thick is still unclear, because the body hair increases after high tension and extreme sadness.