7-month-old babies do not sleep at night can be seen in physiological phenomena, pathological conditions (such as acute respiratory tract infection, gastrointestinal dysfunction, etc.). 1. Physiological phenomenon: for this age group of babies teeth erupt gradually, some babies can affect sleep, often accompanied by increased salivation (drooling), easy to cry, usually no other abnormal performance, is a normal physiological phenomenon. 2.Pathology (1) Acute upper respiratory tract infection: babies may have fever, nasal congestion and other symptoms, which may affect the night sleep, the phenomenon of not sleeping at night, need to intervene as appropriate, such as reasonable antipyretic or the use of sea saline topical nasal spray to relieve the above discomforts, and sleep can be improved. (2) Gastrointestinal dysfunction: If the baby is not fed properly, abdominal discomfort such as bloating and abdominal pain may occur, and some of them may vomit, which may be accompanied by increased crying. (3) Other: such as ear diseases, acute otitis media, the baby may experience ear pain and other discomforts, affecting night sleep and the above phenomena. 7-month-old babies do not sleep at night, there may be other reasons, it is recommended to go to the hospital in a timely manner, improve the examination to clarify the cause of the disease, under the guidance of the doctor to give targeted treatment or treatment.