Several times each year, for about the past 12 years, I have a persistent tickle in my throat that makes it hard for me to talk or laugh. It triggers a dry, unproductive cough. This even happens when sitting at rest. I have seen several allergists about the problem, and have tried everything from OTC allergy meds to Zyrtec. I am now on a routine of Advair and a nasal mist twice a day, but I do not see that it is giving me any relief. It is accompanied by some post nasal drip and a minor runny nose. While it appears to be seasonal, it lasts for weeks at a time and is very aggravating. Ultimately, I end up with back pain, headaches, and fatigue from the cough. Any suggestions as to what to try next?