The Cooper’s Ligament, called the Suspensory Ligament of the Breast in Chinese, is actually the tissue that supports and holds the breast in place from under the skin to the deeper layers of the breast. Young women’s breasts are firmer because the Cooper’s ligament has a stronger hanging effect. After a certain age, the Cooper’s ligament has a certain degree of relaxation, so the breasts will appear to sag. Cooper’s ligament has its own unique role in the diagnosis and treatment of breast diseases, if the tumor cells violate the Cooper’s ligament, that is to say, violate the structure of lifting up the breasts, it will cause further pulling, and the localized skin of the breasts will appear to have certain indentation, which is also commonly seen as the dimple sign in the clinical checkup. Dimples. If the dimple sign is seen on the body of a breast patient, it suggests that there may be a mass in the breast that has violated the Cooper’s ligament and requires clinical treatment.