1. Dead hairy crabs can not be eaten, otherwise it will cause poisoning, and even death, because after the hairy crabs are dead, some of the bacteria in the body will rapidly multiply and spread to the crab meat of the hairy crabs, which will produce a harmful substance, which will cause allergic food poisoning after people eat it.

2, because the hairy crabs after death, there may be a kind of substances called histamine, this substance has a certain degree of toxicity, if people eat, will immediately cause people to vomit, abdominal pain, diarrhea, if this symptom does not go to the hospital immediately for treatment, will bring some harm to the health of everyone.

3, eat dead crabs, the most likely to cause people's vomiting, abdominal pain, diarrhea symptoms, so we eat crabs, even if they are half-dead, do not go to eat, but to eat some fresh crabs, these half-dead crabs, there will be some parasites, so that when you eat it, it will destroy people's lung tissue, may cause coughing, and if it enters into the brain, and even cause paralysis. .