Four season beans if raw, because it contains saponin, erythrocyte agglutinin and other toxic substances, in the cooking process if it is not sufficiently heated, there will be four season beans poisoning symptoms, general poisoning symptoms appear in the eating within 2-5 hours, some of the onset of symptoms of fast one hour. The bean is also called four season beans, it has a high nutritional value, there are a lot of soluble fiber, and there are trace elements. The main clinical manifestations of the patient is the symptoms of the digestive tract, which is due to the uncooked beans in the saponin, saponin and other substances in the gastrointestinal tract has a strong stimulating effect, the patient will appear violent nausea, vomiting, can appear abdominal pain, diarrhea, fever and other clinical symptoms, serious cardia tear will occur leading to gastrointestinal bleeding. In addition, four season bean poisoning can also appear hemolysis or coagulation and other serious complications, life-threatening. Patients who are poisoned cannot wait for recovery on their own, but should go to a regular hospital. If a large amount of beans is consumed, gastric lavage or emetic treatment should be performed.