5-year-old baby sleep drooling can have a variety of reasons, common sleeping position, oral inflammation, dental malformation, central nervous system damage, indigestion, etc., need to clarify the specific causes of the symptomatic treatment. Common causes and treatments 1, improper sleeping posture: such as sleeping on your back and lying on your side easy to appear drooling phenomenon, this situation does not need to worry about, change the sleeping posture can disappear; 2, indigestion: easy to cause more drooling easy to flow out, it is recommended that the gastroenterology department to consult the doctor, daily diet of yam, red beans, etc., you can also take probiotics to improve the intestinal flora, spleen particles to regulate the spleen and stomach, dietary contraindication cold stimulating food; 3, oral inflammation, oral inflammation, dental deformity, central nervous system damage, need to identify the specific causes and then symptomatic treatment. 3, oral inflammation: such as bacterial infection caused by oral ulcers, gum swelling and pain will cause excessive secretion of saliva, such as inflammation spread to the pharynx, there will be drooling phenomenon. Medication can use mouthwash such as compound chlorhexidine gargle, antibiotics can be used amoxicillin and metronidazole joint anti-inflammatory; 4, dental deformities: such as babies with protruding front teeth, lips are not easy to close often exposed teeth, easy to drool, it is recommended that the stomatology department to the diagnosis of deformity should be done as soon as possible after orthodontic correction; 5, damage to the central nervous system: such as congenital cerebral hypoplasia, encephalitis or brain injury will appear often Drooling phenomenon, it is recommended to go to the Department of Neurology to confirm the diagnosis of symptomatic treatment. If the diagnosis is congenital cerebral hypoplasia, hyperbaric oxygen treatment can be carried out in the hospital; if the diagnosis is encephalitis, anti-infective drugs should be selected according to the pathogens, and intracranial hypertension should be given with dehydrating agents such as mannitol, etc. If there is brain injury, artificial hibernation therapy and subcooling technology can be used, and surgery is needed for serious cases.