I know some people have put things in the forum that may be helpful to peope having BO problems in certain parts of their body. There is something called Fungal Sinuitis which may be due to polyps or fungus infections in the sinuses and respiratory system. People who develop fungal sinunitis always smell fecal odors in their noses or breath.
It been known to occur in people with asthma or weak immune systems. Taking streoids or antifungals have been known to be helpful.You can look at the info at the site or google fungal sinuitis,fecal odor and if you have these symptoms go to the doctor and get tests. Hopefully this will help someone. http://www.sinusinfectionhelp.com/fungal-sinus-infection.html