Mastocytosis is the most common breast disease, most common in young and middle-aged women between the ages of 30 and 50. Its main clinical features are single or multiple lumps in one or both breasts, mostly accompanied by periodic breast pain, and mostly related to emotions and menstrual cycle. This disease is neither a tumor nor an inflammatory disease, but a degenerative or progressive change in the structure of the ducts and lobules of the breast, and its pathogenesis is mainly due to endocrine hormone imbalance. This disease belongs to the category of “breast fetish” and “tuberculosis in the breast” in Chinese medicine. The name of the disease was first mentioned in Hua Tuo’s Zhong Zang Jing. The basic pathogenesis is liver and spleen imbalance, Qi stagnation and phlegm condensation. From the circulation of the meridians, the foot Yangming Stomach passes through the breast, the foot Convulsive Yin Liver meridian reaches the lower breast, the foot Taiyin Spleen meridian travels to the outer breast, the foot Shao Yin Kidney meridian and the Ren meridian travel to the inner breast, and the Chong meridian spreads to the middle of the chest. Therefore, the disease is in the stomach meridian and involves the liver, spleen, kidney and the Punching and Ren Channels. First, let’s talk about the four seas. The Ling Shu, under the influence of the idea of the correspondence between heaven and man, believes that there are four seas in nature, east, west, north and south, and there are also four seas in man. It is mentioned in the Spiritual Pivot – Sea Theory XXXIII: “Qibo said, “Man has a sea of marrow, a sea of blood, a sea of qi, and a sea of water and grain.” And all four seas have points connected to the body surface, so acupuncture points connected to the four seas can regulate the four seas and treat the diseases of the four seas. (Note: Renying (ST9) is next to the junctional larynx in the neck, when the anterior border of the sternocleidomastoid muscle, where the common carotid artery pulsates. (Needling the Renying point should avoid the carotid artery. Needling is demanding and should be used with caution by those who are not skilled in the technique.) The use of Renying for the treatment of mastopathy is also based on the theory of the four seas. “Tanzhong is the sea of qi, and its infusion comes out of the upper and lower column bones, and the front lies in Renying.” Tanzhong is the chest, and its connected acupuncture points are at the back of the large vertebrae above and below, and in front of Renying. Therefore, acupuncture can treat all diseases of the chest. The fixed asthma point located next to the large vertebrae can treat asthma and cough from lung diseases because of its role in regulating the qi sea. The breast is on the line of circulation of the Foot Yang Ming Stomach meridian, and the Ren Ying point treats mastopathy as the meridian passes through and the main treatment. In the Ling Shu – Wei Qi 52, there is a sentence that says: “Those who can know the six meridians of the specimen can be free from confusion in the world.” This shows how important the “standard” and “essence” of the six meridians, the three yin and three yang, are. What are the “standard” and “essence”? The root refers to the roots of plants and trees, such as “Lv’s Spring and Autumn Period – First Already”: “Therefore, the pine of a hundred feet is injured at the bottom, and the end is ligusted at the top.” Mark, refers to the top of the tree, as in Zhuangzi – Heaven and Earth: “The top is like a mark branch, and the people are like wild deer.” This is a metaphor for the twelve meridians of the human body in the “Ling Shu” as a tree, with this point being like the root of the tree and the standard point being like the leafy, fruitful crown of the tree. This point and the standard point are where the meridians converge and have a strong adjusting effect on the meridians. All twelve meridians have a standard, “foot Yangming’s capital, in the Li Tui; the standard in the cheeks of Renying held down also.” The Renying point is the standard point of the foot Yangming Stomach meridian. In short, the Renying point is located in the throat of the body, and is connected to the Spleen, Heart, Kidney, Liver, Ren, Chong, Yin and Yang Stilt Channels. At the same time, Renying is the mark of the foot Yangming, and is the place of Yangming’s flow, and is also the meeting point of the foot Yangming and Shaoyang, therefore, in addition to regulating the gastric meridian, it can also regulate the function of the Shaoyang bile meridian, the regulation of the liver (bile) and spleen (stomach) function is precisely the important aspect of the treatment of this disease. In Western medicine, the sympathetic nerve stem, the cervical sympathetic ganglion, the lateral vagus nerve, and the thyroid gland are the main components of the RenYing acupoint. They work by regulating the hypothalamus-pituitary-ovarian axis and the hypothalamus-pituitary-gonadal axis. At the same time, the pressure receptors of the carotid sinus, the rich arteries, veins and lymphatic tissues around the point also have a significant impact on the action of the point.