Q.Recently, I’ve had a lot of “rumbling” in my intestines, so I went to a gastroenterologist and had sigmoidoscopy done. The scope didn’t find anything unusual. However, the same day the test was done, I started having cramps and bloody diarrhea. I went to a different doctor and he did the test again. He said I had colitis and that I must have gotten it from the first scope. He explained that there is a rare type of colitis that occurs when the chemicals that are used to clean the scope come in contact with the colon. Is this true?