In this study surgeon consulted me for 30 patients because of diarrhea after surgical operation. The results are listed below: 2 cases had self limited diarrhea after appendectomy. 3 cases had operations because of peritonitis and diarrhea because of E.coli. one case had diarrhea before and after operation because of the thyroid medulary carcinnoma. 2 patients had got diarrhea...