Five-month-old babies do not sleep soundly at night crying may be caused by calcium deficiency, indigestion, physiological factors, etc., you can take medication, massage and other treatments. Five-month-old babies have a high demand for calcium, if not supplemented in time may cause babies to sleep soundly and cry at night. You can give vitamin D and other drugs under the guidance of the doctor for a period of time after observation. If the baby has indigestion, may produce abdominal pain and other conditions, may also cause the night sleep is not solid crying, at this time you can give the baby to do massage, the method is to the umbilicus as the center, clockwise massage of the abdomen, through the massage may alleviate the crying situation. Physiological factors, such as the environment is too noisy, the temperature is too high or too low, can also lead to the five-month-old baby sleep at night, crying situation. Five-month-old babies do not sleep soundly at night, crying, there may also be other reasons, it is recommended to go to the hospital, improve the examination to clarify the cause of the disease, to give targeted treatment or treatment. All of the above medications should be used under the guidance of a doctor.