Hidden pain in the small stomach after bowel movement needs to identify the cause, may be caused by enteritis, rectal polyps, colorectal cancer, etc., resulting in the need for targeted treatment under the guidance of the doctor, such as drug therapy, surgical treatment, radiotherapy, chemotherapy and targeting. 1. Enteritis: manifested as chronic recurrent abdominal pain, sometimes light and sometimes heavy, sometimes abdominal pain preceded by diarrhea. Antibiotic treatment can be chosen according to the results of bacterial drug sensitivity test, such as gentamicin, norfloxacin, etc.; analgesic drugs can also be used, such as belladonna tablets, atropine and other drugs, which can play a role in relieving pain and diarrhea. 2. Rectal polyps: when defecating, the fecal matter causes irritation to the damaged tissues, causing hidden pain in the patient’s abdomen, and a few patients may have symptoms such as blood in the stool, urgency (discomfort in the lower abdomen, wanting to defecate very much, and a feeling of incomplete defecation after defecation), and mucus stools. In the absence of contraindications, endoscopic minimally invasive treatment is usually adopted, such as cold forceps removal by biopsy forceps, coil removal or electrocoagulation excision for polyps with small diameter. 3. Colorectal cancer: symptoms such as change in bowel habit and fecal character, abdominal pain, abdominal mass, anemia, emaciation, etc. Doctors will formulate treatment plan according to patients’ actual situation, and commonly used treatments include surgery, radiotherapy, chemotherapy and targeted therapy. This symptom alone is not enough to diagnose the disease, do not rule out the possibility of uterine fibroids, cystitis and other diseases, it is recommended that the patient consult a doctor in a timely manner, ask the doctor to clarify the cause of the disease and give targeted treatment.