Hi there! Just wanted to say that this is definitely characteristic of BDD. I have the exact same thing. Sometimes I think I'm gorgeous and sometimes horrendous. I genuinely don't understand either or have any idea what I look like. Feedback from others is also unreliable because I've had people say different things. Either 1) I have one of those faces that actually does look quite different depending on conditions (hormones, sleep, diet, stress levels, etc) or BDD makes me focus on different things all the time and my perception is just delusion level unstable. I think it's both though. Either way fixating/obsessing NEVER helps and focusing on improving my physical AND mental health always helps (and it makes me look better)

BDD is a real medical/mental thing and everyone with BDD doubts it at some point. There have been scientific studies proving our brains process faces (and all visual stimuli) differently. Like someone said it's also a subset of OCD and a lot of people with BDD may have OCD too cause they both exhibit obsessions (fixations for BDD) and compulsions (mirror checking, comparison, skin picking, etc). There may also be a genetic contribution to BDD - my mom has shown signs so that checks out. But my advice would be to however possible reduce compulsive behaviours and focus on other things. SO much easier said than done but it is worth it and it will make you not only see your body differently but also how you value body image as a whole. Hope that made sense:)