Re: ANY surgery that can fix nasal drip?
OK, now I understand. You possibly have non allergic rhinitis. There is no surgery for that. Have you tried sudafed to dry it up? That's not an antihistamine. And another suggestion, did you have food allergy testing as well? Some food allergies manifest in sinus issues. My cousin is allergic to corn and corn products and it shows up as sneezing, runny nose, etc.
All that being said, it may be there is nothing you can do about it other than nasal saline spray every so often to clear your sinuses.