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.
Note, for example, that if you are using the MLA system of referencing, a sentence always ends after the parenthetical reference. Do not also include a period before closing the quotation mark, even if there is a period there in the original. For example, do not write, According to Schama, Louis XVI remained calm during his trial: The Terror had no power to frighten an old man of seventy-two. (822).