Hi,
Dysosmia, or an altered sense of smell, is often caused by toxin exposure, physical irritant, or medication side effect. It may also result from a structural or functional disorder of the olfactory bulb or olfactory system. The experience may be similar to an aura in which an "unpredictable" smell of a burnt substance occurs. Please consult an ENT specialist and a neurologist for diagnosis. MRI or CT scan of the head may be helpful in diagnosis. Hope this helps you. Take care and regards!
I thought I was the only one who had this problem with smells. My spouse thinks I'm crazy that I can smell "burned-off gas" . It isn't all the time, just occasionally. I was wondering if this was a medical problem - will have to check with my doctor.