The baby frequently wakes up at night and can’t sleep soundly, considering that it can be caused by bad habits, illnesses, lack of vitamins and calcium, and need to be treated according to the cause. Serious symptoms need to go to the hospital in time, under the guidance of the doctor for treatment. 1. Bad living habits: need to change living habits, try not to let the baby sleep too much during the day, before going to bed at night, do not let the baby’s mental state is too excited. When the baby sleeps, the quilt should not be too heavy and thick, wear light and comfortable clothes inside, and the height of the pillow should be appropriate. 2. Disease discomfort caused by: timely check the baby body has no prickly heat or eczema, there is no dry and itchy throat, the nose is not ventilated, there are the above conditions, then see a doctor in time. 2. Lack of vitamin D or calcium: need to supplement vitamin D and calcium, you can go to the hospital for a detailed examination of the baby, according to the doctor’s requirements to supplement vitamin D and calcium. Poor sleep quality will affect the development and growth of the baby, if the symptoms do not improve, it is recommended to go to the hospital in time to rule out neurological problems or sleep disorders, targeted treatment.