Because the stomach acid secreted in the body in the morning is very much, so if drinking vinegar may lead to the increase of stomach acid, and then stimulate the stomach, and make the patient produce symptoms such as stomach disease. Drinking less vinegar in the morning can kill the bacteria in the intestinal tract, and vinegar has many benefits, such as beauty care, enhancing liver and other functions, maintaining the acid-base balance in the body, lowering blood pressure, and preventing vascular atherosclerosis. But if the patients with bad stomach must drink less vinegar, otherwise it will bring unnecessary harm, if the stomach acid is too much and drink vinegar, you can eat alkaline food to synthesize the stomach acid, which can reduce the stimulation to the stomach and reduce the damage to the stomach. Usually pay attention to diet, eat less spicy and stimulating food, eat more green vegetables to help the stomach digestion.