The pain below the right breast is considered to be caused by the following conditions: 1. If you are breastfeeding at this time, it is possible that the right breast has poor milk discharge causing the accumulation of milk, thus causing the pain caused by mastitis, you need to use a hot towel for hot compresses in a timely manner, and then use a breast pump or massage to empty the accumulated milk, so as not to cause more serious abscesses; 2. Pain, this condition will appear with hard lumps in the breast, breast pain and other symptoms, can be unilateral breast onset or both breasts together, especially before the imminent arrival of menstruation pain and other intensified; 3, may be suffering from breast cancer, this condition appears pain is mostly advanced, there are obvious hard lumps, there is pain, lymph node pain and other symptoms; 4, there may also be normal development of adolescence or other circumstances caused, it is recommended Go to the hospital for treatment in time.