Hello and Welcome to ‘Ask A Doctor’ service. I have reviewed your query and here is my advice. I really appreciate your query, it is seems to be allergic condition and it could be chronic one. Occupation hazard could be the cause. Secondly, it could be olfactory hallucination, it is kind of functional disorders. Second generation anti-allergic can be tried like Levocetirizine for hallucination. You need to try to come out of the stress and control your self. Hope I have answered your query. Let me know if I can assist you further.