Three-month-old babies with flatulence are usually associated with improper feeding, congenital megacolon, irritable bowel syndrome, dyspepsia and so on. It is recommended to go to the hospital in time to clarify the cause of the disease and correspond to the treatment. 1. Improper feeding: Flatulence can occur due to incorrect feeding position, too much gas-producing food, inhalation of too much air, and overfeeding. Daily attention should be paid to the correct feeding and burping posture. 2. Congenital megacolon: stubborn constipation and intestinal obstruction can occur, resulting in symptoms of flatulence. Surgery is the main treatment. 3. Irritable bowel syndrome: abdominal pain, diarrhea, constipation and other symptoms can occur, leading to bloating. Lactulose, bifidobacteria, lactobacillus, caseinate bacteria and other drugs can be used for treatment. 4. Dyspepsia: mainly manifested as epigastric pain, abdominal distension, early satiety, belching (burping), anorexia and so on. Bifidobacteria and other drugs can be used to treat. It is recommended to go to the hospital in time, clarify the cause of the disease and treat the cause.