Infants grunting and making efforts are considered normal, but may also be related to gastrointestinal dysfunction, constipation and other factors. 1. normal situation, the baby grunts still make efforts to consider is normal, because the baby is relatively small, the body is not fully developed, may be through this way to exercise consumption. 2. Gastrointestinal dysfunction, if the infant gastrointestinal dysfunction, intestinal digestion and absorption capacity decreased, may lead to intestinal flatulence, so this symptom will appear. 3. Constipation, some infants have constipation due to poor bowel movement, may produce the symptom of grunting and making efforts to promote bowel movement. There may be other reasons for babies’ grunting, so it is recommended to go to the hospital in time for a complete examination to determine the cause of the disease and then give targeted treatment or therapy under the guidance of the doctor.