8-year-old children fall asleep and keep swallowing saliva, may be bacterial or viral infection caused by pharyngeal inflammation, may also be gastroesophageal reflux, oral ulcers caused by, parents are advised to take the children to the specialist hospital as soon as possible for diagnosis and symptomatic treatment. At the same time to strengthen the daily oral care, advise children to insist on brushing their teeth every day, eat more vitamin-rich vegetables and fruits, such as tomatoes, dragon fruits, apples, green vegetables, etc., avoid spicy and irritating food, in order to maintain the health of the oral cavity. 1, pharyngeal inflammation: children’s body resistance is low, when the pharynx is invaded by bacteria or viruses, it will cause the throat to become congested and edematous, and stimulate the local skin leading to pharyngitis or tonsillitis, which will be caused by discomfort in the pharynx or salivary inflammation, which will be caused by the pharyngeal discomfort or salivary inflammation. Due to pharyngeal discomfort or excessive salivary secretion, it may not be obvious during the daytime, but after sleeping quietly at night, there will be non-stop gagging. Oral anti-inflammatory oral solution or blue baicalin oral solution should be taken as prescribed by the doctor for anti-inflammatory purposes, and combined with budesonide suspension for nebulized inhalation to alleviate respiratory mucous membrane edema; 2. Gastroesophageal reflux: after gastrointestinal diseases occur in children, gastric juices will be refluxed to the pharynx, which will stimulate the pharyngeal mucous membranes locally, thus resulting in frequent salivation accompanied with nausea, acid reflux and other manifestations, especially more pronounced in the evening after sleeping and lying on their stomachs. Parents should follow the doctor’s advice to children using omeprazole drugs to ease the symptoms, daily life should pay attention to regular diet, do not overeat, and develop good eating habits; 3, mouth ulcers: children with mouth ulcers, touch the ulcer wound will have pain, stimulate the oral cavity, so that the salivary glands to increase the secretion of the salivary glands, which led to the children keep swallowing saliva. It is recommended that parents use a cotton swab dipped in saline to gently wipe the surface of the mouth ulcer, and then spray watermelon cream on the ulcer to promote healing.