It is within the normal range for babies to start teething around 4 to 10 months of age, but the timing of teething varies due to babies’ different physiques and growth and development levels. In addition, some babies are found to have teeth right after birth, such symptoms are birth teeth, and it is recommended to go to the hospital in time. Some babies are teething earlier, they may be teething at more than 4 months, while some children may not be teething at 7 months. Babies should not be teething more than 12 months at the latest, and if babies are just starting to teethe, it will usually lead to symptoms such as becoming grumpy, easy to cry, irritable and salivating. In addition, babies may be uncomfortable during teething, and parents are advised to keep their baby’s mouth clean and hygienic by placing a clean finger or gauze in the child’s mouth to avoid rubbing the baby’s gums. If the teeth erupt too late, you need to pay attention to whether the baby has rickets, whether there are rickets accompanying symptoms, such as occipital baldness obvious, rib edge ectropion and other manifestations, it is recommended to consult the pediatric hospital in time. If the baby’s teeth have not erupted at the age of one week, it is recommended to visit the dental hospital in time to identify the cause of the disease and actively treat it, so as not to delay the growth and development of the baby.