Eating crayfish, it can cause rhabdomyolysis, but not all appear, mainly due to the use of non-compliant shrimp washing powder or allergies. Because it contains high-quality proteins, the human body is very easy to consume high-quality proteins, it is easy to have an allergic reaction, for example, some people eat silkworm chrysalis, it will cause allergies. When eating crayfish, causing an allergic reaction, damage to the muscle, it will dissolve, releasing the myoglobin, and creatine kinase in it. These two substances, in the process of passing through the blood circulation, will be discharged through the kidneys, so that the urine appears red, at the same time, the dissolved muscle, there will be redness, swelling, pain. And if the release of creatine kinase, and myoglobin is more, in a short period of time to block the kidneys, it will cause acute renal failure, not only will appear oliguria, anuria, serious will also appear nausea, vomiting, and even panic, chest tightness symptoms. Therefore, after eating crayfish, the appearance of the above symptoms, must promptly consult a doctor. In more serious cases, hemodialysis needs to be given to treat the disease, otherwise it will lead to death due to severe internal environment disorders.