According to reports, eating raw beans or undercooked beans is easy to cause poisoning, because raw beans contain two substances harmful to human body: hemolysin and toxic protein. These two toxins have a strong stimulating effect on gastrointestinal tract. Generally, you will get sick after eating immature beans for ten minutes to four hours. What are the symptoms of bean poisoning? Mild people feel abdominal discomfort, nausea, vomiting, abdominal pain, diarrhea; In severe cases, dizziness, headache, cold sweat, palpitation, chest tightness, numbness of limbs and other poisoning symptoms occur, especially in children.