The main manifestations of babies not having enough to eat are crying, poor mental state, poor sleep, decreased stool and urine, and slow growth and development. The most important manifestation of a baby who is not full is crying, especially after he/she has just finished eating milk. And there will also be poor mental state, usually look particularly spiritless. The baby does not have enough to eat also manifested in poor sleep quality, may appear to sleep for a short period of time, frequently wake up, after waking up will also have the symptoms of crying. And if the breast milk is insufficient, the baby does not eat enough will also appear stool and urine decrease. If the baby does not eat enough for a long time, there will also be symptoms of slow growth and development, which is manifested in the lack of weight gain and slow height development. If the baby has the above symptoms, may be not eaten enough, if breastfeeding, it is recommended to increase milk secretion through some methods, if necessary, can be mixed with formula to feed together, to avoid affecting the growth and development of the baby.