Raw (or uncooked) string beans contain saponin, hemagglutinin, trypsin inhibitors and so on. Among them, saponin is a strong irritant to the human gastrointestinal tract, and can even cause hemorrhagic inflammation. After consuming four season beans poisoning, most patients have symptoms after 2-4 hours, and some patients have symptoms in 30 minutes. The main symptoms are nausea, vomiting, abdominal pain, diarrhea, accompanied by headache, dizziness, cold sweat and other neurological symptoms. The measures to be taken are as follows: 1. Drinking water several times and letting the patient lie down and rest. 2. For patients with moderate poisoning, if there is more than one vomiting, resulting in dehydration, or hemolysis, then it is necessary to immediately go to the hospital for treatment, and should not be delayed.