Well you might be in company here. I too have BO and very cold hands and feet. I have seen a variety of health professionals about this and there are many theories, but let me give you my other symptoms first, and if you have these two, then we may be suffering from similar symptoms and I can help out you. First off though, I have NOT found a cure for this, but I do believe I'm on the right track.
I have: BO, bad breath (due to a coating on my tongue that gives off bad odor), very cold hands and feet, brain fog (difficulty concentrating), irritability, depression, and itchy/dry skin. Do you have any of these other symptoms? If you do, let me know and we can go from there.
Where are you from? Good luck and take care