Adolescent breast pain may be related to breast development, breast fibroids, squeezing, breast hyperplasia, etc. 1. Breast development: Hormone levels will change during puberty to stimulate the development of the mammary glands, which will lead to localized slight swelling and pain in the breasts, which is a normal phenomenon and can be relieved by massage and physical therapy, and the symptoms will be relieved by themselves after puberty is over. 2. Breast fibroma: Breast fibroma may cause lumps in the breast, mostly unilateral and solitary, with clear boundaries with the surrounding tissues, and can be pushed, accompanied by pain. 3. Being squeezed: puberty is a time of development, if you wear underwear too tight, your breasts will be squeezed or traumatized, which will also produce obvious pain. 4. Mammary gland hyperplasia: the main reason is due to endocrine disorders caused by mammary gland hyperplasia, the early symptoms are during menstruation or menstruation chest breast swelling and discomfort, chest lumps, some patients accompanied by nipple overflow, the end of menstruation symptoms can be relieved after disappearance. It is recommended to go to the hospital for examination and treatment under the guidance of the doctor after finding out the cause of breast pain during puberty.