Thank you for the query.
Such symptoms may be caused by pancreas disease, intestine inflammation disease (Crohn`s disease), intestines obstruction, IBS, intestines severe infection. It is advisable for you to start wit some diagnostics. Full blood work, liver tests (AST,ALT,GGTP), pancreas enzymes (amylase), bilirubin, urine analysis, amylase in urine, stool test
and abdominal ultrasound
. Abdomen X-ray should be done to rule out any urgent bowel obstruction. Depending of the results of this tests, colonoscopy
, upper GI endoscopy (dark stool can be caused by bleeding from peptic ulcer
) and abdominal CT with contrast (enteroclysis) might be necessary.
Hope this will help.