Oh ya.... that's incredibly common to have englarged nasal terbinates if you have allergies.
Your nasal terbinates are the passage-ways from your nose to your sinuses. Often times they become swollen and air cannot flow into the sinuses. The result? Sinus pain, pressure, and bacteria grow.
The bacteria grow, drip into the lungs, and wam-o! You've got some problems.
A great way to reduce swelling of the nasal terbinates is twofold:
1. Sudafed. <b> NOT </b> Sudafed PE. Make sure the ingredient is pseudoephedrine
2. Intranasal corticosteroid such as Flonase, Nasonex, Rhinocort Aqua, or the best of the market (Lindsey will agree, right Lindsey?) <b> Nasacort AQ </b>
It's amazing how just a few quirts up the nose over 2 weeks can really reduce swelling. Sudafed is phenominal at that as well.
It sounds like your kid has allergies too. Take her to the allergy doc, get skin tested, get a HEPA air purifier for her bedroom and the location where she does treatments, get allergy encasings for her matress and pillow (if dust mites are one of her allergens) and get her on an anti-histamine (not claritin...that is the weakest drug out there and is comparable to placebo).
Good luck and keep us posted