Breast pain is a common problem for patients consulting with health care providers and breast specialists. The main clinical problem for patients with breast pain is to determine whether the pain originates from the breast or from outside the breast. Classification: cyclic pain, non-cyclic pain, and extramammary pain. Periodic breast pain: Mostly seen in women with hormonal activity, younger age, average 34 years old, most of the menstruation is not normal, often double breast pain, significant before menstruation, starting from the middle of menstruation, until menstruation gradually reduce, physical activity, especially frequent upper limb work of professional women often aggravated. Non-cyclic breast pain: Most often occurs in older women, averaging 43 years of age, with pain unrelated to menstruation, often described as arbitrary, persistent, and often interfering with daily work when pain is severe. Extramammary pain: such as costochondritis. Etiology 1. The cause of the disease is not well understood, but it is certainly closely related to menstruation, and mildly increased lactogen levels and abnormal plasma fatty acid levels may be related to the production of breast pain. 2. It has been experimentally confirmed that the average levels of luteinizing hormone (LH) and follicle stimulating hormone (FSH) are higher in women with breast pain. It is generally believed that the pathogenesis is due to excessive secretion of estrogen (E) and too little secretion of progesterone (P), or the lack of coordination between E and P, resulting in excessive stimulation of the target organ, the breast gland, and abnormal hyperplasia of the parenchyma and interstitium of the breast lobules, which is incomplete. 4, Chinese medicine believes that “women’s nipples belong to the liver, breasts belong to the stomach”, this disease and premenstrual dysfunction of the internal organs related. Liver depression and stagnation, Qi and color do not run smoothly, breast complex is not due to, namely: “not pass is pain, pass is not pain.” Clinical manifestations 1.Breast cyclical pain: mainly swelling and pain, aggravated before the start of menstruation, and reduced after the onset of menstruation, and gradually disappear. 2.Non-cyclical pain in the breast: continuous or intermittent pain in bilateral or unilateral breasts, sometimes mild and sometimes severe, not related to the menstrual cycle. The pain is mostly located in the upper outer quadrant of the breast, and 50% of patients may have breast nodules. 3, physical examination: after visual examination, gentle palpation of the breast, after excluding the scattered lumps, for the pain site, in-depth examination, so that the patient is lying on his side, breast tissue from the chest wall down, can identify the pain from the breast or the deep side of the rib cage, fingertip pressure on the rib cage to produce pain can be identified. Physical examination of the breast on palpation is sensitive or painful to touch, with a diffuse firm thickening sensation or a diffuse distribution of small granular nodules in the lamellar glands, but without the sensation of an obvious confined mass.