Newborn babies sleep grunting, may be due to hunger, sleep environment discomfort, gastrointestinal dysfunction and so on. 1. Hunger: babies are prone to grunting and sleep poorly when they are hungry, so you need to pay attention to whether the amount of breastmilk is sufficient. 2. Sleep environment discomfort: too much bedding, too cold, too hot, too noisy, too much light, etc., may affect the baby’s sleep state. 3. Gastrointestinal dysfunction: baby indigestion, abdominal cold, etc. may cause gastrointestinal dysfunction, manifested as abdominal distension, abdominal pain, this discomfort will also appear humming. Newborns sleep grunting, there may be other reasons, it is recommended to go to the hospital in a timely manner, improve the examination to clarify the cause of the disease, under the guidance of the doctor to give targeted treatment or treatment.