Yi delusion is a symptom of zinc poisoning by inhalation of zinc oxide fume, in neurological symptoms such as spasms Yi delusion and blurred consciousness, can be found in the pulse rate pharyngeal congestion both lungs in do sound respiratory sounds rough, etc. Preventive measures for yi paranoia: 1. It is forbidden to use galvanized containers and tools for holding, cooking, processing, transporting and preserving acidic foods, such as juice, jam, ketchup, sour milk, sauerkraut and vinegar, etc. It is also dangerous to use galvanized iron barrels for milk. 2, proper storage of various zinc compounds to prevent accidental poisoning. 3. The threshold of zinc salt taste is 15mg/L. Zinc content in drinking water up to 30mg/L has a milky appearance, up to 40mg/L has a metallic taste, and 657-2280mg/L can cause vomiting, so food found to have zinc taste should be stopped. For those who accidentally consume large amounts of zinc salts, 1% tannic acid solution 5% activated carbon suspension or 1:2000 potassium permanganate solution can be used for gastric lavage, but if the vomit with blood should be avoided with the stomach tube and emetic according to the situation discretionary sodium sulfate diarrhea internal milk to precipitate zinc salts, if necessary, infusion to correct water and electrolyte disorders and give zinc removal therapy. Treatment should be given at a regular hospital occupational disease treatment facility.