The causes of drooling in one-year-old children mainly include the following: 1. Symptoms caused by children’s teething, children are in the period of tooth eruption at the age of one week, children will appear more saliva, gums will have a feeling of swelling. If the child’s drooling is not very serious, no special treatment is needed. 2. Symptoms caused by herpes pharyngitis in children, children infected with intestinal viruses will appear herpes pharyngitis, causing drooling, oral pain, anorexia, poor appetite for food, and even fever and other symptoms. You can give children timely treatment to clear the heat and detoxify the toxin, such as the application of busulfan anti-inflammatory oral solution.