I believe BDD is often thought of as an imaginary illusion about oneself. I have seen people on Oprah with BDD or we've all seen anorexics, but I don't believe that people with BDD have illusory delusions about how they look. I believe they really see what they see. It's easy for something to look imperfect, whether it's proportions, shapes, different angles, or anything else. Lighting, in particular, is a significant factor, and you never look the same because lighting conditions are always different. Our appearance relies heavily on external factors. Anorexics, for example, are preoccupied with one body part that never looks good no matter how much weight they lose, but they neglect other body parts. I don't think it's as much in the head as others believe it to be. I think it stems from a real imperfection. Well, this is just my theory.
I do not know if I suffer from it or not because I know my flaws are real. So, whether it's a completely different disorder or not, I know I have OCD, and it's from the inability to accept myself. You've seen yourself one way, and ego creates an image. 'I like how this looks. I want to look like this. This is me. I identify with this.' And then you see yourself with different lighting, different angles, different posture, different movement, and then you think 'that was not me. Who is that hideous thing?'
I believe it's a problem of the mind, but not a completely delusional problem.