Stomach pain after drinking soy milk is mostly considered to be caused by the patient’s own stomach disease, such as chronic gastritis, peptic ulcer, functional dyspepsia, etc. With the existence of such underlying causes, drinking soy milk, as an influencing factor, is likely to induce the appearance of stomach pain symptoms. When there is gastritis, gastric ulcer and other diseases, some patients usually have abdominal pain, bloating, nausea, vomiting and other symptoms, but the specific situation varies from person to person, there are some patients without obvious performance. Soybean milk, as a nutritious drink, contains more vegetable protein, which is not easily digested and absorbed. If the patient himself has indigestion and other conditions, drinking soybean milk will increase the gastrointestinal burden and stimulate the secretion of gastric acid, leading to symptoms of stomach pain. In addition, soybean products are gas-producing foods, which can also easily cause abdominal distension and aggravate stomach discomfort after eating. Patients are advised to go to the hospital for some auxiliary examinations of the digestive system after discomfort, such as gastroscopy can effectively detect and clarify most diseases in the digestive system for the purpose of early detection, early diagnosis and early treatment. It is not recommended to drink soy milk on an empty stomach in daily life. While drinking soy milk, you can choose to eat some starchy foods such as bread and steamed buns, which can make the nutrients in soy milk easier to absorb, but if you have been determined to have stomach diseases, it is recommended to drink less soy milk or eat soy products to reduce the possibility of stomach pain.