When people consume uncooked string beans, they will usually show signs of poisoning within 1-5 hours. However, due to individual physical condition and the amount of consumption, some patients may also delay the appearance of poisoning such as dizziness and vomiting for 1-2 days. Saponins, saponins, trypsin inhibitors and coagulins are toxic substances in string beans, which can irritate mucous membranes and damage red blood cells after being introduced into the blood. When consuming uncooked string beans, the content of nitrite will also increase, which can make the hemoglobin in the blood form a large amount of methemoglobin, thus losing the ability to combine with oxygen, and the body will show symptoms of hypoxia, and the patient can show weakness and blue lips and so on. If the beans are not cooked sufficiently, they will have a strong irritating effect on the mucous membrane of the gastrointestinal tract after entering the gastrointestinal tract. Patients may experience nausea, followed by vomiting and even vomiting blood, as well as abdominal pain, diarrhea, abdominal distension, dizziness and headache. Some patients may experience chest tightness, rapid heartbeat, cold sweat around the body, cold hands and feet, numbness of the limbs, chills, fever, etc. A few patients may also experience electrolyte disorders such as reduced blood potassium. Therefore, before consuming string beans, ensure sufficient time for cooking and avoid consuming undercooked string beans. When symptoms of poisoning appear, seek medical attention promptly and carry out effective treatment under the guidance of a doctor to relieve the symptoms of poisoning as soon as possible. Try to choose a light and liquid diet during treatment to avoid aggravating the burden on the gastrointestinal tract.