Pain under the middle of both breasts is considered to be one of the following possibilities: First, you may be suffering from costochondritis, which will cause pain in the middle of the chest, especially after exertion, the symptoms will be more obvious. Second, may be suffering from breast hyperplasia, there will be lumps in the breast, breast pain, nipples appear unknown secretion, irritability, etc., especially before menstruation, the pain will be more intense. After the onset of menstruation, the symptoms will gradually ease, and the pain intensifies after exertion and temper tantrums. Intercostal neuralgia may be the cause of the pain, especially when sitting for a long time or resting, the symptoms will be more intense. Fourth, it may also be caused by other diseases such as mastitis and gastric disease. It’s best to go to the hospital for further examination, and then according to the results of the examination to carry out appropriate treatment.