Eating without defecation can be seen in long-term stress, mental anxiety, diet and defecation irregularity and other physiological factors, the symptoms are not serious without special treatment. It can also be seen in constipation, intestinal obstruction, intestinal tumors, etc. Lactulose, polyethylene glycol and other drugs can be used to promote defecation, intestinal obstruction should be fasting water, gastrointestinal decompression; intestinal tumors should be treated with surgery, chemotherapy or radiotherapy. 1. Physiological factors: for example, long-term mental stress, mental tension and anxiety, irregular diet and defecation can lead to light eating without defecation, generally self-adjustment of the spirit, regular eating, adjusting the dietary structure, moderate exercise, this symptom can be improved. If necessary, you can use lactulose, polyethylene glycol and other drugs to promote defecation. 2. Intestinal obstruction: Intestinal obstruction leads to obstruction of emptying of intestinal contents, and there can be symptoms of only eating but not defecating. Treatment should be fasting water, gastrointestinal decompression, correcting water, electrolyte disorders and acid-base imbalance, ceftriaxone, metronidazole and other anti-infective can be given, and surgical treatment if necessary. 3. Intestinal tumor: for example, colon cancer, rectal cancer, the common symptoms are change of bowel habit and shape of bowel movement, and there can be symptoms of eating but not defecating, which should be treated by surgery, chemotherapy or radiotherapy. You should go to the hospital to find out the cause of eating but not having bowel movement, and treat under the guidance of doctor.