The Grinch is a Christmas classic in all of it's iterations. From the original to the Carrey to the newest 2018 version, the Grinch has found his way into our holiday traditions. In a previous theory I talked about the problems with his heart growing three sizes. Today, I'm here to figure out if the Grinch was RIGHT to be angry at the Whos. You see, I think there was a reason we all missed - a medical reason. Get your earmuffs ready, Theorists, we're about to get LOUD!