Tummy ache and diarrhea may be eating unclean food, caused by bacillary dysentery or acute gastroenteritis, sometimes uncontrolled eating barbecue, drinking beer will cause this situation. Barbecue ingredients itself is not very clean, resulting in a lot of bacteria on the food, if their own immunity is relatively poor, it is easy to be infected, manifested in nausea, vomiting, abdominal pain, diarrhea and other symptoms of acute gastroenteritis. The first thing to do is to eat a light diet, and reduce the amount of food, drink a little more rice soup and other food. Medications can use a little quinolone drugs, such as norfloxacin, levofloxacin and other drugs, but the age of <18 years old patients, prohibit the use of quinolones, you can use penicillin or cephalosporin antibiotics, pay attention to more rest, do not eat fruits and other foods first.