From the sound of it your bird has a sinus infection. Yoda has had a good post on this and it is a very viable treatment. I have not used the puffer myself as Featherhead has, so this may be an alternative also.
I have used Tylan 200 injected into the swollen pocket as described in an earlier post. In a couple of days it should be better. If it hardens or has hardened then it will need to be cut out. This can be done at home also.
Tylan, needles and syringes can be found at most farm stores or at Tractor Supply. Tylan 200 is about $20 and the syringe/needle will be really cheap.
If you need specific direction, pm and we can exchange #'s to make sure they come through it fine.
Tylan does not have any activity (killing power) on bots, worms, internal or external parasites. It's use is solely as a broad spectrum antibiotic. Note: If injected into muscle, it can permanently atrophy the muscle at the injection point. (Usually not a problem unless repeated muscle injections are done in a localized area)
Best of Luck