Biid (body identity integrity disorder) is something that I have and is different than bdd. It really depends on why someone thinks you have bdd. I compare BIID to more like transgender because you feel like you are in the wrong body, I feel like I should be in a wheelchair because my legs shouldn't work or be there as well as my left arm. Bdd is where you feel something is wrong with your body as far as I know like a scar or acne or whatever it is.