I am a female, non-smoker but I have this almost daily recurrent olfactory hallucination that I can smell cigarette smoke. The smell, which is definately a phantom one as no one is smoking in my bedroom in the middle of the night nor at the gym when I am working out, is very strong, makes my eyes water and can last for hours. I googled this and there is a site where many people say they suffer from this exact problem. I read about fifty of the posts and what struck me is that a significant number of them are non smokers and are hypothyroid. I have been hypothyroid for over twenty years now and although my doctor would say I am hyper thyroid based on my blood test results I have none of the typical hyperthyroid symptoms and feel, for the most part, quite well and begin to feel unwell about a month to six weeks after the endo orders a reduction. Could phantom smoke smells be related to hypo or hyper thyroidism? Your responses would be most welcome. I do actually have an MRI scheduled for September 28th but only because I asked for one since two of my mothers three siblings died of brain tumours - at ages 46 and 60 and I am now 53.