sandy
i have had the same thing all my life, over the past couple years it has seemed to get worse, its post nasel drip, the hard part is diagnosing why you have it, allergies? cronic sinus infections? mine they cant find the reason, my doctor prescibed atrovent, its very strong and you cant use it for very long only 4 days, but it worked by drying up the post nasel drip. good luck sandy