Abdominal pain after eating crayfish is considered a common acute gastroenteritis, because the lobster itself belongs to unclean food, usually practice is not clean enough, resulting in acute intestinal spasm to produce a series of abdominal pain, diarrhea and even vomiting and other systemic conditions. It is recommended to clean diet, eat as little as possible and then drink more water, you can take some drugs that regulate intestinal flora such as yeast tablets, drugs that promote gastrointestinal digestion such as stomach and digestive tablets, such as serious can take patchouli. People who eat lobster usually have the habit of drinking alcohol at the same time, so if there is drinking alcohol never use cephalosporin or penicillin antibiotics to avoid allergic reactions. If the diarrhea, vomiting is more serious, there may also be metabolic dehydration, water-electrolyte disorders, it is recommended to promptly go to the hospital intravenous fluids to prevent more serious complications occur.