I battled sinus infection for years. I finally went to a specialist who found that I had nasal polyps, and a deviated septum and suggested surgery. The surgery was not bad and it was a good move as I found out that I could actually breath out of my nose again. The sinus headaches all but disappeared and infections are now rare. But if you have polyps and have them removed, you  probably have to use a steroid nasal spray or the polyps will reappear. I use Rinachort and it is working as no polyps have reappeared.