Stomach discomfort with nausea and dizziness, consider the possibility of acute gastroenteritis, which is associated with unclean diet and overeating. You can take oral acid suppression (omeprazole) and antiemetic (gastroflucan) to relieve symptoms. If combined with diarrhea, oral antidiarrheal treatment with montelukast can be taken. It is recommended to avoid eating greasy and spicy food, and to take easily digestible and absorbable food, quit smoking and drinking, pay attention to rest, avoid staying up late, keep enough sleep, drink more hot water, and pay attention to keeping the abdomen warm. If the symptoms still cannot be relieved, it is recommended to visit the gastroenterology department of a large hospital to improve relevant examinations, such as stool routine, gastroenteroscopy, gastrointestinal tumor markers, etc., to further exclude other organic diseases of the digestive tract.