<s>[INST] I have been having flu like symptoms for over 9 days. I dont have diarrhea nor have I actually vomited. I have a loss of appetite and after I eat I get really bad abdominal pains. I have also noticed that I am peeing a lot more and my stools seem to be getting very dark. [/INST] Hi, Thank you for your query. I can understand your concerns. Myositis is occasional complications of influenza infection, and it can involve abdominal muscles too. Influenza caused by avian A/H5N1 virus are reportedly associated extra-pulmonary manifestations such as diarrhea.Otherwise, flu is not associated with bad abdominal pain. Howsoever severe pain abdomen may occur due to acute pancreatitis caused by infections (coxsackievirus, cytomegalovirus, echo virus). Regards  </s>