Generally, babies start teething around six to eight months, but depending on individual differences, some babies teethe early and some late. Teething is usually normal for a three-month-old baby, and as long as the baby is developing normally, parents need not worry too much. Before teething, babies tend to drool, like to chew more, and become bad-tempered, easily angry, and do not like to eat milk. Some babies may also experience restless sleep, bleeding from the teeth, and low fever. These are all normal manifestations of teething and do not require special treatment. During this period of teething, parents should pay attention to the oral hygiene of the baby, clean the baby’s mouth once a day, you can use a clean cotton ball to wipe the baby’s teeth and dental bed. At the same time, you need to carry out the dental bed exercise, prepare the baby with bumpy teether, clean rubber toys for the baby to chew. In addition to strengthen the nutritional supply, nutritional deficiencies will lead to poorer dental quality, in the baby three months can not yet add complementary foods, you can ensure that the daily supplementation of vitamin D, add complementary foods can be given after the appropriate vitamin, calcium and other substances.