“Olfactory reference syndrome (ORS), preoccupation with a false belief that one emits a foul or offensive body odor, has been described around the world for more than a century. However, only a few small studies have systematically assessed ORS's clinical features.”
https://pmc.ncbi.nlm.nih.gov/articles/PMC3139109/#:~:text=Olfactory%20reference%20syndrome%20(ORS)%2C,systematically%20assessed%20ORS's%20clinical%20features.
I didn’t see anyone mention that they saw a therapist or a counselor concerning this interesting illness. I’m not saying anyone crazy especially with all the responses but cover all the bases especially when regular medical channels have been exhausted. Also, consider a naturopathic doctor too.