A one-month-old baby sleep frequently wake up, may and nerve development is incomplete, lack of calcium, environmental factors, etc., need to be based on specific causes to take targeted treatment, such as timely calcium, to create a quiet and comfortable sleep environment. 1. Imperfect brain and nerve development: the baby was born a month ago, the nerve development is not perfect may appear to sleep frequently wake up, in the process of growing up, the nerve will continue to develop and perfect, wake up symptoms will gradually ease, generally do not need too much intervention. 2. Calcium deficiency: if the baby body lacks calcium, will also appear in the case of frequent waking up, and even accompanied by occipital baldness or night sweating symptoms, you can give the baby supplement vitamin D, if necessary, follow the doctor’s orders calcium treatment. 3. environmental factors: if the night sleep around a variety of noises or sleeping place and odor caused by the baby discomfort will also wake up, in this case, the need to find the factors affecting the baby, and remove it, such as try to create a good sleep environment for the baby. One-month-old babies sleep frequently wake up may also have other reasons, it is recommended to go to the hospital in time, improve the examination to clarify the cause of the disease, to give targeted treatment or treatment.