Had right sinus infection last week with green drainage, & cheek pain put on z pak. all drainage has stopped & cheek pain much improved. still notice discomfort in teeth on right upper side. is infection gone but lingering sinus irritation?

If you have soreness you may still have infection. Additional course of antibiotics may be indicated. Ask your prescribing Physician to reevaluate. Also have your Dentist make sure that you do not coincidentally have infected upper back molars.

If the roots of the teeth in the area are near the maxillary sinus, then you can still feel some residual discomfort as the sinus infection heals. There could also be an infection of one of the teeth in the area that is causing discomfort as well. Occasionally, an infected molar could even be draining into the sinus. Have a dentist take a 2D or 3D X-ray of the area to help diagnose.