Babies frequently waking up at night and grunting are considered to be related to environmental factors, but may also suffer from indigestion, calcium deficiency and various other problems. 1. Environmental factors, if the baby is allowed to sleep in too noisy environment or the environment temperature is relatively high, more airtight, this symptom may occur. 2. Indigestion, if the baby has indigestion, intestinal discomfort and increased gas in the intestines, it may affect the baby’s ability to fall asleep and cause frequent night waking. 3. Calcium deficiency, if the baby’s body calcium deficiency may lead to the baby’s nervous system excitability, so this symptom will appear. The baby frequently wakes up at night, 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.