Thanks for the additional information.
well from your description one of the possible diagnosis in yourcase is CHRONIC RHINOSINUSITUS; Chronic rhinosinusitis is defined as a complex inflammatory condition involving the paranasal sinuses and linings of the nasal passages that lasts 12 weeks or longer, despite attempts at medical management.
factors that can contribute are
Defective mucicillary function
Infection with viruses,bacteria,or fungi.
Chronic rhinosinusitis predisposes to poor sinus drainage and frequent seconadry infections infections(that is what happening to you now)
The goal of medical therapy for Chronic rhinosinusitus is
to promote sinus drainage,
reduce chronic inflammation,
eradicate infecting pathogens.
CT scan of sinuses can be done to make diagnosis
treatment goal often requires a combination of topical or oral glucocorticoids, antibiotics, and nasal irrigation.Therapy is given for at least 21 days and may be extended for up to 10 weeks in refractory cases.
if patient doesnot responds to intial therapy cultures can be taken to find an appropriate antibiotc.During intial antibiotic tretment consideration should also be given to possibility of Methicillin resistant staph aureus(MRSA).
I would suggest you to visit your ENT and discuss your disease on lines outlined above.
Hope it helped