A foreign friend ate a lot of fried watermelon seeds (chewed and swallowed with the skin) in China one day, and on the third day afterwards, he did not pass any stool and was irritable. It turned out that he was suffering from rectal fecal impaction. When a large number of hard fecal lumps accumulate in the rectum and the patient is unable to expel them by himself and often has to ask for help to expel them in order to solve the pain, then he is suffering from fecal impaction. Rectal fecal impaction is a common emergency in anorectal medicine, characterized by difficulty in defecation, pain around the anus and abdomen, irritability and even cold sweat, and some patients have headache, dizziness and even fainting. Because of the embedded fecal block pressure rectal mucosa fecal ulcer, the upper end of the embedded feces can not go down the microbial liquefaction into fecal water from the periphery of the overflow to the end of the rectum, forming a “pseudo-diarrhea”, even after diarrhea, the previous symptoms are still not relieved. Common reasons are as follows: 1, because of the fear of pain delayed defecation preoperative, postoperative pain, the patient fear of defecation, and did not use 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 leading to 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 trips, 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. Prevention of rectal fecal impaction is mainly: 1, normal people should develop a regular defecation habits, defecate, can not hold back the stool; 2, should be more exercise, drink more water, eat more vegetables, fruits, diet should not be too fine; 3, reasonable application of various laxatives, antispasmodics, antidepressants, if necessary, Chinese medicine to regulate constipation; 4, maternal should encourage more activities, drink more water, diet balance; 5, 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 difficulties in defecation, warm water enema is needed, and if necessary, the nursing staff or family members should wear gloves to dig out the stool with their fingers.