Thank you for your query at DoctorSpring.com
I understand your concern.
Yes, a swelling in the cheek bone with greenish mucus is indicative of a sinus infection- chronic sinusitis. You need to get a CT PNS done to rule out mucocele or retention cyst in the maxillary sinus. It can't be treated medically, presents with a swelling, and needs surgical intervention.
Flomase will hlp, however, a mucocele won't resolve with only Flomase.
So please get a CT PNS and get back to me, I will advise you further,
I am sorry I did not write the expansion in the first place itself.
It is CT SCAN of the para nasal sinuses.
If you can't get the scan done now, I will advise you a course of Cap. Augmentin 625 mg twice daily for 7 days. It is a combination of Amoxicillin + Clavulanic Acid ) and works well in sinus infections.