I have MS and it sucks. See here: http://www.cracked.com/personal-experiences-1704-5-awful-realities-life-with-invisible-illness.html
5 Awful Realities Of Life With An 'Invisible Illness' If you have ever had the plague, no one accused you of faking it to get handicapped parking for your oxen or whatever. Not the case with my particular disease. Authors By Cezary Jan Strusiewicz, Dani Fryling Published July 14, 2015