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.
In general, commas and periods do not convey any meaning, so they usually can be removed from a quotation if they appear after the last word you quote. Exclamation points and questions marks, though, do convey meaning, so they should not be removed from quotations. Note the examples below: