The old fart and fecal matter when urinating may be caused by acute gastroenteritis, dysentery, chronic colitis, anorectal diseases, etc., and can be treated according to the cause. 1. Acute gastroenteritis: associated with dietary impurity or abdominal cold, can be accompanied by nausea, vomiting, abdominal pain and other symptoms, can be taken orally to help digestion of medication, such as polypeptide tablets, etc., abdominal pain in patients with severe, you can take belladonna tablets and other treatments. 2. Dysentery: it is a kind of intestinal infectious disease, which can be accompanied by symptoms such as acute and severe diarrhea and pus in stools, etc. It can be treated with oral antibiotics. 3. Chronic colitis: abdominal pain, diarrhea and other symptoms can occur, can be recurrent, can check the colonoscopy to confirm the diagnosis, taking drugs to adjust the intestinal flora treatment, combined with bacterial infections, antibiotic treatment, such as norfloxacin hydrochloride capsules and so on. 4. Anal and intestinal diseases: such as anal fistula, hemorrhoids, etc., can go to the hospital anorectal department, patients with serious symptoms, can consider surgical treatment. The old fart when urinating with fecal matter, can go to the hospital for further examination to confirm the diagnosis, according to the cause of targeted treatment. Drugs need to be used under the guidance of a professional physician, not to self-medication.