When breasts develop and body hair grows, it means that menstruation is imminent. A woman’s first menstrual period is clinically called menarche. When breasts develop and body hair grows, it means that the secondary sexual characteristics start to develop and the ovaries start to secrete progesterone and estrogen, which is accompanied by cyclic changes in the lining of the uterus, and then menstruation will occur, but the exact time of menstruation will be different because of the different physical qualities of women. When breasts develop and body hair grows, it is recommended to wear loose clothes to avoid squeezing the breasts and causing breast inflammation. Women should pay attention to the hygienic care of their private parts when menstruating, and actively change sanitary napkins to avoid bacterial infection, and also pay attention to maintaining a regular work and rest schedule. If there is any discomfort, it is recommended to go to the hospital in time for examination and symptomatic treatment under the guidance of the doctor.