If you feel nauseous all the time, but vomiting does not occur, you should consider functional gastrointestinal diseases, such as functional dyspepsia and esophageal diseases. For organic problems, liver and biliary problems should be considered, and further tests such as gastroscopy and liver function tests can be done to rule out organic pathologies. If there is no organic lesion, it should be treated as a functional gastrointestinal disease. If the nausea is recurrent and organic gastrointestinal pathology is ruled out, appropriate psychotherapy, sedation or anti-anxiety and anti-depressant medication can be given in the gastroenterology or psychology department, which is often effective.