raw beans contain a toxic protein called lectin, and some beans contain "saponin", which can be decomposed and destroyed at high temperature, but if you eat half-cooked beans, it will cause poisoning. Those with mild poisoning can heal themselves without treatment after vomiting and diarrhea. However, because there is no specific medicine for bean poisoning at present, those with severe poisoning can only be sent to hospital for rescue except vomiting, catharsis and gastric lavage, but there is little hope of escape.