Newborns always sleep humming limbs, can be seen in physiological conditions, pathological conditions (such as neonatal pneumonia) and so on, whether it is normal need to be specifically analyzed. 1. Physiological conditions: at the beginning of the newborn’s sleep, the above performance can occur, or the sleeping environment is noisy, the surrounding temperature is too high, can make the baby in the sleep for grunting limbs moving. Keep the surrounding environment quiet, comfortable temperature can be, the above situation of the baby without other abnormal symptoms, such as fever, poor response, etc., usually considered normal. 2. Pathological conditions: such as neonatal pneumonia, the baby can appear elevated body temperature, moaning, spitting or coughing and other symptoms, can cause the baby discomfort, sleep is not solid, always humming limbs moving around, can be accompanied by poor response, poor feeding, etc., is not normal, need to actively seek medical attention. Newborns always humming limbs moving, 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, to give targeted treatment or treatment.