The causes of right breast pain are related to many factors such as gender, age, and special periods of the body, and are mainly divided into the following situations:1. Breast pain can occur during puberty when breast tissue develops in both men and women, and can manifest as unilateral or bilateral breast or nipple pain.2. Elevated levels of estrogen in the body prior to menstruation stimulate the mammary glands to appear breast pain, which can manifest as pain in the right side of the breast alone.3, Early pregnancy due to hormonal changes in the body unstable breast pain. 4, benign breast tumors or cysts, due to the increase of the tumor compression of the surrounding tissues and nerves pain. 5, malignant breast tumors, infiltrative growth of the tumor compression of the surrounding tissues and nerves, poor blood circulation and so on appeared on the affected side of the breast pain. 6, mammary trauma, due to the external impact or extrusion and so on, resulting in mammary soft tissue damage pain. 7, too large breast, the breast is too large. Pain. 7. Breasts are too big, such as macromastia or too much activity leading to soreness in the breasts.