Hidden pain in the right breast may be caused by physiological factors such as menstruation, mental stress, or other diseases such as breast hyperplasia, breast fibroma, or mastitis, or breast trauma. 1. Physiological factors: If menstruation is about to come, the hormone level in women’s body will change, which will lead to hidden pain in the breast. Secondly, excessive mental tension and stress can cause endocrine disorders, which can lead to hidden pain in the right breast of women. 2. Mammary hyperplasia: Mammary hyperplasia is a common benign breast disease, the cause of which is related to endocrine dysfunction, and the patient will have symptoms such as breast pain, nodules or lumps. 3. Breast fibroma: Breast fibroma is a benign tumor occurring in the breast, the most common manifestation of patients is breast lumps, some patients will have symptoms of breast pain, the nature of the pain can be hidden pain. The nature of the pain can be insidious. The cause of the disease is not yet clear, and it is mostly related to hormones. 4. Other diseases: mastitis, breast trauma, cardiothoracic diseases, herpes zoster, and breast cancer can lead to right breast pain. There are many causes of right breast tenderness, so patients are advised to go to the hospital for relevant examinations to make a clear diagnosis.