I have a diagnosed staph infection in my nose. I took antibiotics for 7 days which resolved the issue, but now the infection is back after a few days of stopping the antibiotics. I went to the doctor. He confirmed my nostrils are inflamed, red and crusted over inside. I'm now getting a headache and sinus pressure. The doctor prescribed Flonase, but I do not have allergies. Is Flonase an effective way to cure a staph infection?