Chronic Nose and Throat Problem.

I often gets sore throat. My nose is always wet and when I catch cold or sore throat it is blocked too much followed by so much of cough and my uvula, throat becomes red. It is very rare if I eat or drink cold item. I have checked many Dr and they give antibiotics and some pain killer etc. and after taking these for 5-6 days I feel good but it catches again after approx 2 month. Some cough is always there even if I am well. I once consulted with ENT, he performed some Endoscopic etc test and then prescribed medicine for continuous 6 month but got no result. Tests : CBC : TLC - 16000 cells/cu.mm Polymorphs - 77% Total IgE (6 yr ago) : 2447.8 IU/mL Nasal Endosscopic : DNS Rt. with B/L Rhino - Sinus Disease with B/S Rhinitis and Endolaryngoscopic : Sub Acute Pharyngo-Laryngitis I am from village region so its not possible to avoid dust etc. Please provide any permanent solution as I am suffering from this disease from very long time & got tired of taking so much of allopathy medicine.