Painful feeling of a tendon on the breast is a common symptom in the clinic, and the main reason is the formation of breast hyperplasia. Due to the overgrowth of the glands caused by breast hyperplasia, it is most obvious in the upper outer quadrant of the breast and the end of the armpit, which will form a cord-like swelling, and when touched, the pain is a bit like a fascial sensation, and in some severe cases, it may be caused by touching clothing or strenuous activities. This situation indicates that the symptoms of breast hyperplasia are relatively serious, it is best to review the breast ultrasound or mammogram to check the specific degree of hyperplasia. For more serious pain, you can also consider applying medication to relieve the pain. Commonly used medications in the clinic are Chinese medicinal preparations, including Breast Fetish Elimination, Hong Jin Xie Jie Capsules, and Breast Lump Elimination, which can help to relieve the pain problem.