Baby noisy night sleep, may be related to hunger, poor sleep environment and other physiological factors, may also be due to vitamin D deficiency rickets, colic and other causes. 1. Hunger: common in the period of breastfeeding small children, the need to eat every three to four hours of milk, easy to cause the baby frequent hunger phenomenon, due to hunger uncomfortable, there will be a night noisy night sleep. 2. Poor sleep environment: If the baby is in a sleep environment with too much noise, or the indoor temperature is too high, too low, poor ventilation, etc., may lead to the baby feel uncomfortable, thus interfering with sleep, showing noisy night sleep. 3. Vitamin D deficiency rickets: the disease can lead to increased neural excitability of the brain of the child, which may cause noisy sleep at night, may also be accompanied by excessive sweating, crying and waking up easily during sleep, occipital baldness and other symptoms. 4. colic: at night if the baby colic, resulting in abdominal distension and discomfort, it will cause the night noisy sleep. Especially children within 3 months after birth are prone to colic. The baby’s night noisy sleep, may also be caused by other reasons, parents should promptly help the baby to find triggers, if necessary, need to consult a doctor as soon as possible, clear causes, by the doctor’s guidance for treatment.