(A) the concept of biofeedback therapy Every movement of the human body is a complex physiological process completed by the coordination and cooperation of various systems, but this physiological process is not perceived by people. For example, the daily defecation activity requires fecal filling of the rectum, causing rectal defecation sensation, which is regulated by the nervous system of the brain, causing the puborectal muscle to relax, the internal and external anal sphincter to open, the abdominal pressure to increase, and the feces to be expelled. If there is a problem with one of these components, it is difficult to pass stool. Patients also find it difficult to understand: how can this embarrassing situation arise when they have difficulty in passing stool? With the development of science and technology, this question has become easier, and this is the question that biofeedback technology can answer. Biofeedback technology is a visual and auditory technology that transforms physiological information that the human body cannot detect into signals that can be understood through instruments and fed back to people. With the help of this instrument, the physiological disorder is regulated and corrected to restore it to normal, which is biofeedback therapy. In the field of constipation, this therapy is mainly used for functional outlet obstruction type of constipation. It solves the spasm of the anal sphincter, corrects the abnormalities of the synergistic movements of defecation and establishes a normal defecation pattern. Biofeedback therapy is used abroad as the treatment of choice for constipation caused by abnormal defecation reflexes, and patients who are not treated with biofeedback therapy are not easily included in the surgical list. (II) biofeedback treatment of constipation equipment is a combination of electromyography and biofeedback therapy host equipment, including a 12 mm diameter, 45 mm long columnar internal myoelectric receptor of the anal canal, three body electrodes of the anterior oblique muscle of the abdomen, and a biofeedback therapy host and computer connected to it, the computer screen can display and measure the electrical activity of the puborectalis muscle and external anal sphincter, and use it as The computer screen can display and measure the electrical activity of puborectal muscle and external anal sphincter, and use it as an objective indicator to record the patient’s reflection. (C) the principle of biofeedback therapy 1, the principle of diagnostic action using EMG EMG biofeedback instrument three longitudinal strip electrodes, first let the patient relax the anus, you can observe the resting state of the baseline, then let the patient contract the anus, you can see the strength of the anal sphincter contraction, and finally let the patient do defecation action, if the signal is at the normal baseline level, the defecation function is normal; if the signal is similar to the contraction, the patient is normal. If the signal is similar to that of the contraction, it means that the patient’s anal sphincter is in spasm and it is the abnormal sphincter synergy that causes constipation. 2, therapeutic effect Using EMG myoelectric biofeedback instrument to teach patients to do defecation action training, first focus on training relaxation of the anus, after the patient mastered the basic action, further training alternate relaxation, contraction, defecation and other actions. After the patient has mastered the basic movements, further training of alternate relaxation, contraction and defecation can be achieved. After the biofeedback training treatment, the patient learns to relax the anal sphincter during the defecation action, while the septum and abdominal muscles exert themselves, thus eliminating constipation and restoring a healthy and relaxed life.