Just got back from the world. My DD,18, had to use a wheelchair for most of the trip. She has ulcerative colitis and is so fatigued she couldn't walk around the parks. She did okay the first 2 days but then just couldn't do it anymore. Since this in an "invisible condition" I expected some comments from guests whom don't know any better but not from CM's . Most were friendly and acoomodating but we encounterd two, both at the MK, that I thought were not only insensitive, but rude. The first we encountered at rope drop in frontierland while waiting to head over to splash mt. We were near the front of the line. He looked my daughter up and down and then said "what's the matter with you? Did you sprain your ankle or something?" My DD doesn't like to discuss her illness as it is embarassing so I simply said that she has a chronic illness.My DD said "I get tired easily". I could have sworn he rolled his eyes. I know that CMs probably see "fakers" on a daily basis but they need to realize that not all disabilities are visible. The second incident was at Big Thunder Mountain. This is one of the only rides where you actually enter through the exit, so having the wheelchair may allow you to have a shorter wait unless there are several wheelchair parties ahead of you. The CM took one look at her and said "What's with the wheelchair?" What did you do?" I again repiled that she had a chronic illness an DD explained that she tires easily. He told her that she should "take a nap". I was angry. They should keep their comments to themselves. I must say that in all the other parks, as well as on the buses, the cast members were polite and helpful.