Babies in 3-4 months of age salivary glands gradually mature, coupled with the eruption of milk teeth stimulated the nerves on the gums, salivary glands are therefore stimulated, saliva will be more, and at this time the baby’s mouth is shallow, swallowing ability is also limited, there will be the phenomenon of drooling. Parents should pay attention to strengthen the skin care of the corners of the baby’s mouth, timely dip suction mouth out of the saliva, as the baby months of age increase drooling phenomenon will gradually disappear. If your child is over nine months old and still drooling especially, in addition to strengthening daily care, such as applying baby oil to the corners of your baby’s mouth, you should also have a few more bibs for your baby to prevent inflammation and small red pimples caused by the lower jaw often being in wet clothes. You should also train your baby to swallow and chew. You can choose teething foods, such as teething cookies and vegetable sticks. If the child usually does not leave saliva, suddenly drooling to be alert to whether the child has oral ulcers, gingivitis and other oral diseases, to take the baby to the hospital for examination, so that timely treatment.