Seven-month-old babies cry at night for more reasons, which may be related to insecurity, hunger, disease state. 1. lack of security: if the baby sleep environment or night accompanied by people change at night crying, need to be vigilant whether due to insecurity caused by crying. 2. Hunger: if the baby’s milk is not enough before bedtime or compared with the usual amount of milk has dropped significantly, there is obvious foraging behavior, need to consider whether there is a state of hunger. 3. Disease state: if the baby crying at night, at the same time there is bloating, blood in the stool, etc., need to consider whether the digestive system diseases, such as intussusception. If your seven-month-old baby cries at night and is obviously difficult to appease, it is recommended that you seek medical attention to further clarify the cause of the illness.