Newborn babies grunting and moving their hands and feet while breastfeeding are mostly physiologic, but also abnormal breast milk volume, poor breastfeeding posture, gastrointestinal dysfunction, etc. should be considered. 1. Physiological, the baby in the process of breastfeeding will produce a sense of satisfaction, enjoy the process of breastfeeding, making grunting sounds. 2. Abnormal amount of breastmilk. If the amount of breastmilk is relatively low and breastfeeding is laborious, the baby may make exertion sounds. If the amount of breastmilk is sufficient, the baby swallows frequently and develops a grunting sound. 3. Poor breastfeeding posture, may inhale air, appear sound, each breastfeeding as much as possible to let the baby contain the nipple and areola. 4. Gastrointestinal dysfunction, if the baby’s abdomen is cold, gastrointestinal dysfunction may occur, abdominal distension, abdominal pain and other symptoms of discomfort, there will also be grunting hands and feet moving around. The newborn baby breastfeeding sound, hands and feet moving, as long as there is no other abnormalities, most of them are physiological, if necessary, take the child to the hospital.