The reasons for breast pain during puberty include the following: 1. Normal reaction during the development of the mammary glands. A distinctive feature of puberty is that the breasts begin to develop, and localized swelling and pain during the gradual development of the breasts is normal, as long as the degree is not particularly serious, there is no need to worry about it.2. It may be a disease specific to puberty. The breasts of adolescent breast fibroma patients will suddenly increase in size and accompanied by obvious pain, at this time the patients need to go to the hospital for ultrasound examination, clear diagnosis, adolescent breast fibroma volume is relatively large, the patients need to go to the hospital as soon as possible to undergo surgical treatment. 3, belongs to the reaction after the trauma. If the breast is squeezed or traumatized, the local area may produce more painful reaction than normal adult women.4. Rarely, it may be caused by some special circumstances, such as pregnancy, after intense sexual behavior of the breast reaction.