sneezing odor

my sneeze has a very bad odor which has just been noticed over a period of 2-3 months.i have no clue why this has been happening but it is very embarassing as it smells like ammonia.i do not have any known allergies and i am also not under kind of medication what so ever.i do take vitamins in the morning " one-a-day" but other than that ,none .
please advice the cause for the same and also if possible some remedy,
thanks,
sam

[National Jewish Health]

Bad odors are often associated with infection of the nose or sinuses; occasionally even with a dental infection.  You should first get a complete exam of your nose and throat by an ENT specialist and treatment for whatever infection is found.

Some medicines can also cause bad or at least unusual odors.  Unlikely to be vitamins but you might want to hold the vitamins for a week or two.

A condition called atrophic rhinitis can also do this.  It is associated with excessive dryness of the membrane lining the nose.  There is no specific treatment, but keeping the nose moist with nasal washes and the use of a water-based lubricant may help.  To learn more about this technique please read our nasal wash treatment information by copying and pasting this address

http://www.nationaljewish.org/disease-info/treatments/alt-ther/nasal-wash.aspx

into the address window of your internet browser.  Share this information with your doctor to see if you would benefit from this daily treatment.