Stomach nausea may be caused by odor stimulation, early pregnancy reaction, gastritis, etc. According to the cause, you can take fresh air, vitamin B6, gastric mucous membrane protector such as bismuth potassium citrate, etc. to relieve. 1. Odor stimulation: such as greasy smell, car exhaust smell, etc. can cause some people to experience physiological regurgitation, nausea, gastric distress, etc., which can be relieved by leaving the odor area and going to a place with a better environment to breathe fresh air. 2. Early pregnancy reaction: only occurs in pregnancy women, due to the sharp rise in blood HCG, can appear stomach nausea and other early pregnancy reaction, can take vitamin B6, light diet to ease the symptoms. 3. Gastritis: It can be treated with gastric mucous membrane protector such as bismuth potassium citrate and acid suppressant such as omeprazole. If the symptoms are not relieved, or accompanied by other symptoms, you should go to the hospital in a timely manner, after the cause is clear to give targeted treatment, the above medication should be used under the guidance of a doctor, prohibit the use of private medication.