My girlfriend is 35 year old asian female who has allegeries and sometimes experiences migraines. She has been experiening smelling menthol almost constantly for the last week. It gets more intense if there is another strong smell such as spicy food or gasoline, but the smell is there constantly. She just went to the doctor and they are sending her to a neurologist. I was wondering what you may think this could be or what may be the cause of this constant smell? The title of this post is the diagnosis of the GP.