Some food poisoning may present with central nervous system damage, causing blurred vision, etc. It may manifest as being transient and vision will return when the food poisoning is corrected and fully recovered. Food poisoning, which is caused by people eating food contaminated by bacteria, bacterial toxins, fungi, poisons, or containing toxic substances, is a common clinical emergency, and in severe cases, various complications often occur, resulting in the death of the child. Symptoms of food poisoning mainly include dehydration, acidosis, and even shock and coma. Clostridium botulinum poisoning can cause blindness, difficulty in swallowing and breathing, and death due to respiratory paralysis. Fungus can cause liver and kidney damage, convulsions, neutropenia, thrombocytopenia and so on.