Three-month-old babies do not sleep soundly and always wake up may be caused by environmental factors, but also for pathological factors such as vitamin D deficiency rickets and so on. If the baby sleeps at night, there is too high an ambient temperature, too noisy, etc., there will be a lack of sleep, you should ensure a good sleep environment, you can reduce the emergence of such phenomena. In addition, if there is a vitamin D deficiency, rickets will appear, may appear sleep disturbance, excessive sweating and other symptoms, can be supplemented with vitamin D, the use of vitamin D drops and so on. In addition, it is easy to accompany the phenomenon of calcium deficiency, you can take calcium gluconate at the same time to relieve. If the baby’s sleep disturbance at night phenomenon is serious, go to the hospital in time for examination, the use of drugs should follow the doctor’s instructions.