Babies grow teeth and cry at night, is a relatively common reaction in the process of tooth growth, may be related to mood irritability, gum discomfort, body fever and other factors. 1. mood irritability: some infants in the process of teething may be emotionally irritable, sleep disturbances and other symptoms, so the night will be crying. 2. Gum discomfort: If the gums are red, swollen and painful during teething, it will directly affect the baby’s mood and lead to more than crying at night. 3. Body heat: Some infants may have body heat or fever during teething, so infants may cry and be emotionally unstable. If fever occurs, it is recommended to seek medical treatment promptly. Infants may salivate (drool) and be irritable during teething. For the time being, it is recommended to observe for a period of time. If the infant is found to be like this for a long period of time, it is necessary to consult a doctor in time and have targeted treatment under the guidance of a medical professional.