Eat crayfish two hours after the abdominal pain may be acute gastroenteritis, food poisoning and other causes, need to take fasting and rehydration, take scopolamine, montelukast, norfloxacin and other drugs treatment. 1. Acute gastroenteritis: to reduce food intake and hydration, if acute gastroenteritis with severe vomiting, the need for temporary fasting. Abdominal pain is more pronounced can take antispasmodic and analgesic drugs, such as scopolamine, belladonna tablets, diarrhea is serious need to cooperate with antidiarrheal drugs, commonly used is montelukast. If there is a bacterial infection, you can use norfloxacin, ciprofloxacin and other antibiotic drugs. 2. Food poisoning: patients should rest in bed and fasting, if the diarrhea and vomiting is serious, need to take rehydration to avoid dehydration and electrolyte disorders. When abdominal pain is severe, oral antispasmodic and analgesic drugs. If there is an allergic phenomenon, need to take oral loratadine, benadryl and other anti-allergy drugs. Give a light fluid or semi-fluid food after the symptoms are relieved. Eat crayfish, two hours after the abdominal pain, should promptly go to the hospital, identify the cause, targeted treatment, to avoid delay in treatment.