I hve been suffering from sinusitis for a long time was operated 4 removal of xtra bone in 2010 but since dat I hve not completely recovered..as my left side still gets blckd cause of swellings I hve stopd otrivin for a yr nw . I think I m suffering frm post nasal drip n d mucus gets collected vry often in my throat cozing Halitosis plz suggest any treatment which will help me get rid of post nasal drip and halitosis completely.