The baby has not been able to eat enough, which may be caused by low milk quantity, poor milk quality, incorrect feeding position, metabolic diseases, and so on. 1. Mother’s milk secretion is not enough to meet the baby’s demand, or the quality of milk is not good, protein and other nutrients content is low, the same milk intake can not balance the baby’s energy consumption, will lead to the baby to show that they want to eat all the time. 2. Incorrect feeding position will result in the baby not being able to suckle enough milk within a short period of time, and the baby will also show that he/she wants to eat all the time. 3. When the baby suffers from metabolic diseases (e.g. hyperthyroidism, etc.), the demand for food will increase. Parents need to observe whether the affected baby has symptoms such as excessive sweating and wasting. The baby has not been eating enough, there may also be other reasons, such as the formula milk brewing ratio is wrong, it is recommended to go to the hospital in time, complete the examination to clarify the cause of the disease, under the guidance of the doctor to give targeted treatment or treatment.