Morning brushing nausea retching, lunch nausea retching, how to do

Nausea and retching after brushing your teeth in the morning and after lunch may be caused by gastroesophageal reflux, chronic gastritis, gastrointestinal dysfunction, and Helicobacter pylori infection. Gastroenteroscopy should be performed in hospital. If Helicobacter pylori infection is diagnosed, quadruple drug therapy should be prescribed.