Nausea and vomiting before bedtime can be caused by stomach diseases, intracranial lesions, pregnancy and other reasons. 1. Stomach diseases: such as gastritis, gastric ulcer and other lesions, gastritis people can appear nausea and vomiting, stomach distension, stomach pain and other phenomena, while gastric ulcer people can also appear nausea and vomiting, abdominal pain, abdominal distension and other phenomena, this kind of people can be through the acid inhibitor such as omeprazole for treatment. 2. Intracranial lesions: for example, brain tumor, etc., can appear intracranial pressure increase and other symptoms, so it can cause nausea and vomiting phenomenon, we should go to the hospital in time, and actively carry out surgical treatment. 3. Pregnancy: Early pregnancy people can appear nausea and vomiting phenomenon, you can go to the hospital for human chorionic gonadotropin to determine whether there are symptoms of pregnancy. Nausea and vomiting before bedtime is recommended to consult a doctor in time, and follow the doctor’s instructions for treatment.