The sticky mouth in the morning after drinking may be caused by insufficient water intake after drinking, vomiting after drinking, and poor gastrointestinal function. 1. Insufficient water intake after drinking: Insufficient water intake after drinking, the human body is in a state of dehydration after one night, resulting in increased secretions in the mouth and trachea, which will lead to the phenomenon of sticky mouth in the morning after drinking. 2. Vomiting after drinking: because alcohol will stimulate the mucous membrane of the gastrointestinal tract, causing excessive secretion of gastric acid, resulting in nausea and vomiting and other symptoms, and after vomiting without timely cleaning up the oral cavity of the foreign body, there will be the phenomenon of sticky mouth in the morning after drinking. 3. Poor gastrointestinal function: If the patient’s own gastrointestinal function is poor, coupled with the consumption of alcohol will stimulate the gastrointestinal mucosa, causing bile reflux into the oral cavity, thus appearing in the morning mouth viscous, bitter and so on. It is recommended that alcohol should be consumed in moderation, and if symptoms such as discomfort occur after drinking alcohol, they should go to the hospital in time to avoid aggravation of the condition.