Sir, Previous 18 months I am facing post nasal dip. I also ct scan my sinus. And doctor says I have DNS problem also. But it is common. And last 1 year I am facing itching whole body mainly night time. When I take anti allergic tablets that time both conditions goes low. Also I take immunotherapy of septline tab. 3 months. And also take all blood tests. But alks are normal (that tests for sinus surgery that doctor proscribed) but I taken second opinion he told me you have allergy .what to do sir .l am suffering from last 2 year. Mainly post nasal dip .plz help me sir.