Rectal fecal impaction is a special kind of constipation, a form of rectal constipation, which belongs to the emergency of anorectal surgery, characterized by difficulty in defecation, pain in the perianal area and small abdomen, irritability and even cold sweat, and individual patients have headache, dizziness and even fainting. Due to the fecal ulcers occurring in the rectal mucosa due to the pressure of the embedded fecal masses, the feces that cannot go down at the upper end of the blockage is liquefied by microorganisms into fecal water that overflows from the periphery to the end of the rectum, forming a “pseudo-diarrhea”, and even after diarrhea, the previous symptoms are not relieved. In Chinese medicine, this is called “hot knotted collateral flow” (in the case of actual internal organs, the stool is usually dry and knotted, but sometimes yellow-smelling fecal water is released, but no dry urine is diarrhea, and there is still a Yangming internal organs with actual evidence, which is called “hot knotted collateral flow”). The rectum is about 15 cm long and can temporarily store a certain amount of feces. When the amount of feces in the rectum reaches a certain level, it will stimulate the pressure receptors in the intestinal wall and cause a defecation reflex. If, for various reasons, the sensitivity of the rectal mucosa to stimulation decreases, the ability of the defecation reflex decreases or disappears, a large amount of feces accumulates in the rectum for a long time and gradually becomes a larger hard mass, blocking the rectum, the pressure in the rectum increases rapidly, which can trigger a strong bowel movement, perianal and pelvic floor muscle spasm, pain, swelling, and occasionally a small amount of thin feces can leak out, which is fecal impaction. Common causes 1, abuse of laxatives: long-term abuse of laxatives can lead to reduced sensitivity or even loss of pressure receptors on the rectal mucosa, so when the rectum is filled with feces can not lead to the defecation reflex, resulting in fecal impaction. 2.Barium enema: In the clinic, some patients need to do fecal imaging and other examinations, because of the need for contrast, so the barium enema, because the barium is easy to deposit, so at the end of the examination will be barium discharge, but also need to carry out saline cleaning enema and other measures to clean up the residual barium in the intestine. If the residual barium is not discharged in time, it will be easy to have embolism. 3.Fear of pain and delayed defecation: after anal surgery, because the nerves around the anus are sensitive to pain, many patients delay defecation for fear of pain during defecation, and do not take corresponding laxative measures, resulting in fecal retention in the rectum for too long, resulting in fecal impaction. 4, defecation power is not enough: mostly in the elderly and long-term bedridden people, the elderly due to old age and physical weakness, the rectum’s motor function is weakened, coupled with reduced movement, often unable to defecate. For various reasons long-term bedridden people, usually weaker, coupled with the long lying injury and reduced movement, also agree to occur fecal impaction. 5, mental and dietary factors: excessive mental tension, so that sympathetic excitement, resulting in colorectal spasm, can not be normal peristalsis, pushing feces down, resulting in embolism. Part of the patient’s diet is too fine also easily lead to constipation, and even fecal impaction. 6, low crestal myelopathy: such as sacral 2, 3, 4 pelvic parasympathetic nerve injury, cauda equina tumors, etc., blocking the defecation reflex arc, triggering fecal impaction. 7, diabetic neuropathy type constipation: the pathogenesis of diabetic neuropathy is not completely clear, but it is known that the high blood sugar of diabetic patients through various factors lead to neuropathy, resulting in damage to the vegetative nerves, resulting in decreased gastrointestinal peristaltic function, fecal discharge difficulties, and even fecal impaction. Prevention and treatment of fecal impaction 1, to develop good bowel habits, fixed time defecation, defecation, do not hold back the stool for a long time, usually should be more exercise, drink more water, eat more vegetables and fruits, do not eat too fine. 2, do not abuse laxatives, should be under the guidance of doctors, reasonable application of laxatives. 3, for the elderly or patients who are bedridden for a long time, if necessary, regular use of cork or glycerin enemas to help defecation, if fecal impaction occurs, family members can wear gloves to dig out the stool, or sent to the hospital for medical treatment. 4, the mother should encourage proper activity, drink more water, and eat a balanced diet.