I know CF can allow bugs to colonize the lungs. Have any of you heard of CF allowing bugs to colozine and set up camp in the sinuses? Also, is it bacteria of can CF enable viruses and fungi also? Can CF enable bacteria that are unaffected by common anti-biotics? Two years ago I started having this pain sensation in my head that's like a sinus infection.. urgent care gave me an antibiotic..no effect. The pain has been constant for 2 years. Since then I've seen an ENT who did a sinus CT, and endoscopy..said sinuses were clear. When I asked him if I have sinusitis he gave me a strange response saying that "keep in mind this is just a snapshot of right now". He also said he could do sinus surgery "if I wanted" where he turns the individual sinuses into one big hole. Wierd. Have you guys heard of having sinusitis but getting a clear sinus CT and endoscopy? (I've also had an MRI)