Chronic diarrhea is a common symptom of both. However constipation can be a problem too. In ulcerative colitis, constipation can be a sign of inflammation in the rectum and in Crohn's disease it can be a sign of an obstruction in the small intestine.
Does the  go before or after the period. I was taught in school, when I was growing up, that the ending quotation mark always goes after the period. However, in college, I'm noticing that's not always what is happening. Same as when I sometimes read news articles. She took her to the party and she remembered saying, have fun.
And in the case that the quotation is at the end of the sentence AND one is writing a research paper with MLA internal citations, the period comes outside of the quotation marks and after the internal citation. EX: Disease was originally thought to originate from unbalance humors or devilish spirits (Robinson 56).