Babies often have increased drooling, irritability and crying before teething, and some babies also have fever and other symptoms. 1. Babies usually start teething at 4~6 months after birth, and it is called delayed eruption of milk teeth if milk teeth have not erupted at 10 months. 2. Before teething for a period of time the baby may have increased saliva, irritability, tantrums, often biting the hand and so on, these are because of teething before the baby has discomfort in the mouth, do not have to worry too much. Some babies may also have fever, the symptoms are mild and can subside after teething. Parents should pay attention to the teething process to keep the baby’s mouth clean, reduce the intake of sweets, too much saliva in a timely manner with a towel to prevent damage to the skin.