Night crying is usually referred to as children crying at night. Uncomfortable sleeping environment, too much excitement before bedtime or overfeeding, etc. are easy to cause children to cry at night, followed by calcium deficiency and other pathological factors can also cause children to cry at night, need to identify the causes of targeted treatment and therapy. 1. Maintain a suitable sleep environment: an uncomfortable sleep environment may cause children to cry at night, you can give the baby to create a comfortable and suitable sleep environment, let the baby keep a good mood before going to bed, the light should be dark, as far as possible quiet. 2. Do not play too excited before bedtime: to develop a good routine, go to bed on time, let the baby quiet down, do not be too excited to amuse the baby, so as not to stimulate the nerve excitation center is difficult to fall asleep. 3. Do not overfeed the baby: feed too full easily lead to excessive metabolism, resulting in stomach upset, difficult to sleep normally, so before bedtime should not let the baby eat too much! 4. Calcium: If the baby lacks calcium, it is easy to cause increased nerve excitability, resulting in night crying, often accompanied by excessive sweating at night and other phenomena, can be supplemented with vitamin D and calcium under the guidance of the doctor to improve the symptoms. Children may also have other causes of night crying, it is recommended to go to the hospital in a timely manner, improve the examination to clarify the cause of the disease, give targeted treatment or treatment.