The lack of taste in the mouth accompanied by nausea is generally considered to be caused by peptic ulcer, chronic gastritis and acute gastroenteritis. 1. Peptic ulcer: it can cause stomach pain after eating, usually relieved 1-2 hours after meals, accompanied by acid reflux, heartburn and nausea and other symptoms, which can cause the symptom of no taste in the mouth. 2. Chronic gastritis: it may be related to drug stimulation, bile reflux and Helicobacter pylori infection, which will cause patients to have no taste in the mouth, nausea and vomiting symptoms. 3. Acute gastroenteritis: viral or bacterial infection leads to gastrointestinal dysfunction, causing loss of appetite, tasteless mouth, nausea and vomiting symptoms. It is recommended that patients need to go to a regular hospital to receive a systematic examination, according to the relevant results of the examination, treatment under the guidance of a specialist.