15 days baby flatulence, may be caused by improper feeding or lactose intolerance and other reasons, you can do exhaust exercises, massage or improve feeding and other methods to relieve. 1. Improper feeding: If the breastfeeding process is fed too quickly, the mouth of the nipple is large, the baby will swallow a lot of air in the process of eating, resulting in abdominal distension, you can promptly pat the back or abdominal massage to promote intestinal peristalsis to alleviate the flatulence, it is recommended that timely replacement of the appropriate nipple, and let the child to the appropriate position of the breastfeeding. 2. Lactose intolerance: newborns due to too little lactase, may not be able to breast milk, milk powder in the lactose fully digested, bloating and other symptoms can occur, you can massage the abdomen to slow down the bloating, a small number of times to drink breast milk, milk powder, or choose lactose-free milk powder to improve the symptoms. The baby’s flatulence needs to be dealt with in a timely manner to alleviate the baby’s discomfort, and the baby can go to the hospital to find out the cause of the flatulence, and then targeted treatment.