Who made the diagnosis? Did that doctor explain/offer a treatment? Is your mother elderly, has she had sinus problems, what medicines does she take, does she have migraines, has she been diagnosed with Alzheimer's? There is no one proven treatment, and many people suffer for years. Has she seen an Ear Nose Throat specialist, had a CAT scan, have you considered going to one of the Institutes that study smell- like Monell in Philadelphia (there are others).