Under normal circumstances after eating pineapple will not cause poisoning phenomenon, because pineapple is a kind of fruit similar to pineapple, is a kind of food species commonly used by people. If the pineapple is not ripe or some people to pineapple inside the pineapple hydrolysis enzyme and other components have allergic phenomenon, then after eating pineapple will appear corresponding poisoning symptoms. Pineapple is not ripe when there is a sour taste, then people eat often cause gastrointestinal tract reaction, there will be nausea, vomiting, abdominal pain, diarrhea, nausea, fatigue and a series of symptoms. Serious cases will also be due to dehydration and make the patient appear coma, shock, limb convulsions, numbness of the hands and feet and other phenomena. If the consumption of pineapple caused by allergic reactions, patients often appear rash, itchy skin, face swelling, poor vision symptoms, some patients will also appear asthma, breathing difficulties and other symptoms, endangering the patient’s health.