The principle and function of scraping

Gua Sha is a traditional health therapy, which mainly involves repeatedly scraping the smooth skin with a scraping tool. Gua Sha can dilate capillaries and increase sweat gland secretion. It has a good effect on preventing high blood pressure, heat stroke, and muscle soreness. It can dredge meridians, promote blood circulation, dispel cold and detoxify, and relieve fatigue, etc., so it has many benefits to the body.

Gua Sha, which promotes blood circulation and removes blood stasis, can regulate the contraction and relaxation of muscles, so that the pressure between tissues can be regulated, thereby promoting blood circulation around the scraped tissues and increasing tissue flow, thereby playing the role of "promoting blood circulation and removing stasis" and "removing blood stasis and promoting new blood".

Scraping to adjust yin and yang has a significant effect on adjusting the balance of yin and yang in internal organs. For example, for those with hyperperistalsis, scraping the abdomen and back can suppress the hyperperistalsis and restore it to normal. On the contrary, for those with decreased intestinal motility, it can promote their motility to return to normal. This shows that scraping can improve and adjust the functions of internal organs and balance the yin and yang of the internal organs.

Relaxing muscles and unblocking meridians. Damaged soft tissues such as muscle fascia, ligaments, and joint capsules may generate pain signals, which, through the reflex action of nerves, put the related tissues in a state of alert. Muscle contraction, tension, and even spasm are reflections of this state of alert. Its purpose is to reduce limb activity and thus relieve pain. This is the body's natural protective response. At this time, if not treated in time or the treatment is not thorough, the damaged tissue may form adhesions, fibrosis and scars to varying degrees, which will continuously emit harmful impulses, aggravate pain, tenderness and muscle contraction tension, and then cause secondary pain lesions in the surrounding tissues, forming metabolic disorders, and further aggravating the pathological changes of "pain due to obstruction". Clinical observations show that whenever there is pain, the muscles will be tense, and whenever the muscles are tense, there will be pain. They are often mutually causal. During scraping therapy, we can see that once the painful lesions are eliminated, muscle tension is also eliminated. If the tense muscles are relaxed, the pain and compression symptoms can be significantly reduced or disappear, and it is also beneficial to the repair of the lesions. Scraping is an effective way to eliminate pain, muscle tension and spasm. The main mechanisms are: first, it strengthens local circulation and increases local tissue temperature; second, under the direct stimulation of the scraping board, the pain threshold of local tissue is increased; third, tense or spasmodic muscles are stretched through the action of the scraping board, thereby relieving spasm and tension and eliminating pain.

Adjusting information Each organ of the human body has its own specific biological information (the inherent frequency and bioelectricity of each organ, etc.). When an organ becomes diseased, the relevant biological information will change, and the change in the organ's biological information can affect the functional balance of the entire system and even the whole body. By acting on specific parts of the body surface through various stimuli or various forms of energy transfer, certain biological information is generated, which is input into the relevant organs through the information transmission system, and the abnormal biological information is adjusted, thereby playing a role in adjusting the diseased organs. This is one of the bases for scraping cancer treatment. For example, scraping the Neiguan acupoint and inputting adjustment information can adjust the coronary circulation, prolong the left ventricular ejection time, enhance the myocardial contractility of patients with angina pectoris, increase cardiac output, improve the ST segment and T wave of the electrocardiogram of coronary heart disease, increase coronary flow and blood oxygen supply, etc. For example, scraping the Zusanli acupoint and inputting adjustment information can have a good regulating effect on the pituitary-adrenal medulla function, improve immunity and adjust gastrointestinal motility.

The scraping process can cause local tissues to become highly congested, and the vascular nerves are stimulated to dilate the blood vessels, which speeds up the blood and lymph circulation. The phagocytic function and carrying capacity of immune cells are enhanced, which accelerates the elimination of waste and toxins in the body, and nourishes the tissue cells, thereby purifying the blood, increasing the body's resistance, alleviating lesions and promoting recovery.

The process of self-hemolytic scraping is a process in which blood vessels dilate until capillaries rupture, blood overflows, and bruises form locally on the skin. These blood clots (Sha) will soon disintegrate and cause autohemolysis, forming a new stimulus factor that can enhance local metabolism and have an anti-inflammatory effect. Autologous hemolysis is a delayed, benign, weak stimulation process, which can not only stimulate the immune function and adjust it, but also act on the cerebral cortex through the centripetal nerves, and continue to regulate the excitement and inhibition of the brain and the endocrine balance.