Scraping is an effective method to eliminate pain, muscle tension and spasm. The main mechanisms are as follows: first, strengthen local circulation and increase local tissue temperature; Secondly, under the direct stimulation of scraping boards in various methods, the pain threshold of local tissues is improved; Third, the relationship between nerves or spasmodic meridians and twelve skin parts: "If you want to know the skin part, you must learn from meridians, and all meridians are like this." The division of the twelve-skin position is based on the distribution of the twelve meridians, that is, the twelve meridians has its own branch collaterals, which float on the body surface and have its own distribution area. Because there are twelve meridians, the skin area is also divided into twelve meridians, and the combination of six meridians of hand, foot and mouth is called six meridians skin area. The branch of meridians is collaterals, and the skin can also be said to be the division of collaterals, so Su Wen's Spleen Theory also says: "Where there is the twelve meridians, the skin is also." The relationship between skin meridians is of great significance to the diagnosis and treatment of diseases. Su Wen's Spleen Theory: "The skin is the part of the pulse, and the evil guests in the skin must open, and the evil guests in the collaterals must open. When the collaterals are full, they will be injected into the meridians, and when the meridians are full, they will stay in the house. " It is pointed out that pathogenic factors from the outside to the inside, with scraping board as a tool and various manipulations, can stretch the muscles groaning through skin and contracture of fu organs, thus relieving their tension, spasm and pain. (4) Information Regulation Every organ of the human body has its own specific biological information (natural frequency and bioelectricity of each organ, etc.). ). When the organ is diseased, the relevant biological information will change, and the change of organ biological information can affect the functional balance of the whole system and even the whole body. Through various stimuli or various forms of energy transfer, it acts on specific parts of the body surface, producing certain biological information, and inputting it into relevant organs through the information transmission system to adjust abnormal biological information, thus playing a regulatory role in diseased organs. This is one of the foundations of scraping treatment and health care. Scraping, acupuncturing and inputting regulation information to stimulate Neiguan point can regulate coronary blood circulation, prolong left ventricular ejection time, enhance myocardial contractility and cardiac output of patients with angina pectoris, improve S-T segment and T wave of coronary heart disease electrocardiogram, and increase coronary blood flow and blood oxygen supply. Stimulating Zusanli point with scraping method, acupoint pressing method and pressing method, and inputting regulatory information, can have a benign regulatory effect on the functions of pituitary and adrenal medulla, improve immunity and regulate intestinal movement.

(5) The scraping process of removing toxins (scraping the skin) can make local tissues highly congested, stimulate blood vessels and nerves, dilate blood vessels, increase blood flow and lymph, strengthen phagocytosis and handling power, accelerate the removal of wastes and toxins in the body, nourish tissues and cells, thus purifying blood, increasing systemic resistance, alleviating illness and promoting rehabilitation. (6) The conduction of qi and blood (through the meridian system) plays a nourishing and warming role in human body. Scraping acts on the muscle surface, making the meridians unobstructed and qi and blood accessible, then the blood stasis will be dispersed, the blood stasis will be disintegrated and eliminated, the whole body will be smooth, and the local pain will be alleviated or disappeared. Modern medicine believes that scraping can make local skin congested, capillaries dilated and blood circulation accelerated; In addition, the stimulation of scraping can regulate the relaxation and contraction function of blood vessels and the permeability of blood vessel walls through neuroendocrine, enhance local blood supply, and improve the process of scraping and abscess formation throughout the body. It is a phenomenon that blood vessels gradually expand until capillaries rupture, blood overflows, and blood stasis spots are formed locally on the skin. These blood clots (abscesses) will disintegrate quickly and produce autohemolysis.

Autohemolysis is a kind of delayed benign weak stimulation process, which can not only stimulate and regulate immune function, but also act on cerebral cortex through cardiac nerve, and continue to regulate the excitement and inhibition of brain and the balance of endocrine system.