Stomach pain, black eyes and fainting need to be alert to upper gastrointestinal bleeding and cardiovascular diseases. Common diseases of upper gastrointestinal bleeding include fundic varices and gastric perforation. A small amount of gastrointestinal bleeding is not particularly obvious, but some patients have a large amount of bleeding, which can even cause infection in the chest cavity. Some patients may experience hemorrhagic shock when the bleeding is large, so they may experience pain in the stomach followed by fainting. Patients with gastric perforation will not only have severe pain in the stomach, but also cause a general fever and other phenomena. Elderly people should be alert to the fact that it is caused by cardiovascular diseases, such as myocardial infarction and angina pectoris, etc. Patients with these diseases will have chest pain during an attack, and some patients will mistake the upper abdomen for the stomach, and elderly people should have an electrocardiogram in time to help diagnose the condition.