Babies can eat teething cookies at around 6 months old. Whether exclusively breastfeeding or formula feeding, generally from 6 months after the start to add complementary foods, and infants around 6 months is also the period of eruption of milk teeth, at this time it is easy to itchy and painful gums, to give babies teething cookies to help ease the discomfort of the eruption period, but also to promote the eruption of teeth. When giving babies teething cookies, it is important to note that because of the dryness, it is necessary to let babies drink more water, but also can give babies the appropriate addition of some other complementary foods, such as pureed fruits, egg yolks and so on. Teething is a physiological phenomenon, teething individual children may have low fever, increased saliva, salivation and sleep disturbance, irritability and other symptoms. Parents do not need to worry too much, but if the baby has a prolonged fever and cries abnormally, consult a specialist for evaluation and treatment.