I have a disorder called a Mast Cell Activation Disorder. It doesn't have any more name than that because doctors don't yet know more than that. There are a few Mast Cell Activation Disorders that are known, and named. There are more that doctors are just now realizing exist. With testing, experts are comfortable enough to admit, 'yes, your mast cells are acting completely wacky.' But they don't know why, and they don't have names for my particular brand of wackiness as yet.
So I just get to say that I have MCAD and leave it at that.
And MCAD? It is truly bizarre and can lead to an amazing number of situations that are honestly rather ridiculous and hilarious.
Like my butt.