Rectal fecal impaction is a common emergency in anorectal medicine, characterized by difficulty in defecation, pain in the perianal area and small abdomen, irritability and even cold sweat, and in some patients, headache, dizziness and even fainting. Because of 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. Chinese medicine is called “heat knot byflow”. Common reasons are as follows: 1, the fear of pain delayed defecation: preoperative, postoperative pain, the patient fear of defecation, and did not use the appropriate soft stool laxative measures, feces can not be eliminated for a long time, embedded in the rectal cavity. 2, defecation power is not enough: common in the elderly, the long-term bedridden elderly. Due to the declining motor function of the rectum and rectal contraction weakness, coupled with reduced movement, often unable to defecate. Maternal sometimes also appear fecal impaction, mainly due to reduced activity, abdominal muscle relaxation, coupled with the reduction of coarse fiber resulting in excessive retention of feces. 3, pharmacogenic fecal impaction: strong stimulant laxatives, smooth muscle antispasmodics, antidepressants, drug addicted patients, as well as radioactive barium gastrointestinal angiography after the failure to take timely measures to discharge residual barium, can cause rectal fecal impaction. 4, ignore the stimulation of defecation: work or business trip, travel, often ignore or forget to defecate, fecal impaction occurs. 5, mental factors: various factors lead to excessive mental tension, due to sympathetic excitement, colorectal often in a spastic state, can not be normal peristalsis, resulting in fecal impaction. Prevent the occurrence of rectal fecal impaction method is mainly normal people should develop a regular defecation habits, defecate, can not hold back stool; plain should be more exercise, drink more water, eat more vegetables, fruits, diet is not too fine; reasonable application of various laxatives, antispasmodics, antidepressants, if necessary, Chinese medicine to regulate constipation. Maternity should encourage more activity, more water, and a balanced diet. For elderly people who are bedridden for a long time, special attention should be paid to them. They can be given topical open cork regularly and regularly to help defecation, and if the patient still has difficulty in defecation, warm water enema is needed, and if necessary, nursing staff or family members should wear gloves to dig out the stool with their fingers.