The main causes of sour-smelling stools are slow intestinal peristalsis, indigestion, intestinal flora imbalance, acute enteritis, which can be treated by the gastroenterology department of the hospital. 1, slow intestinal peristalsis: stools in the intestinal tract accumulate for a long time and lead to sour-smelling stools. It is recommended to improve dietary habits, eat more fresh vegetables, fruits and coarse fiber food, such as carrots, water radish, cabbage, etc., to stimulate defecation, exhaust, and promote intestinal peristalsis; 2, indigestion: when there is indigestion, the stomach digestion of food is damaged, part of the food will be discharged into the intestine in a semi-digested state, which in turn causes stimulation to the intestinal wall, resulting in the intestinal wall to expel the food as it is, so that the food is discharged. This is why the stool has a sour odor. Treatment should pay attention to the diet, avoid overeating, can be used under the guidance of the doctor to stomach and anti-eating tablets or lactobacillus tablets for treatment. In addition, attention should be paid to abdominal warmth, avoid cold, keep a happy mood, which is conducive to disease recovery; 3, intestinal flora dysbiosis: harmful bacteria in the intestinal tract and food residues react to produce a sour smell, and with the feces together, resulting in sour-smelling stool. In this case, probiotics can be taken to regulate the intestinal flora; 4, acute enteritis: in acute enteritis attack, the feces in the intestine for a relatively short period of time, and alkaline mucus neutralization time is short, acidic, so the discharge will have a sour smell. Treatment should eliminate the cause of the disease, and early patients should take oral antispasmodic and antibiotic drugs. Those with moderate systemic symptoms should be treated with intravenous medication for rehydration in addition to oral medication. Severely ill patients should rest in bed and fast temporarily. Water and electrolytes should be replenished in time to regulate water, electrolytes and acid-base balance.