Crystal clay inside the main toxic ingredients are borax and glue, if the crystal clay poisoning, the first will be manifested in the gastrointestinal tract reaction, usually appear abdominal pain, diarrhea, nausea, vomiting and so on. If the poison violates the mucosa of the gastrointestinal tract, resulting in gastrointestinal mucosal damage, serious cases will also appear gastrointestinal bleeding symptoms, such as vomiting blood or blood in the stool and vomit coffee-like material or black stool and so on. If the toxin is absorbed through the mucous membrane of the gastrointestinal tract, it will be invaded to all organs of the body through blood circulation, and commonly invades the central nervous system, resulting in dizziness, headache, nausea, vomiting, and in severe cases, coma, convulsions, shock, and so on. If it affects the liver and kidney functions, leading to liver and kidney failure, there will be generalized jaundice, oliguria or anuria, generalized edema and so on.