ears plugged up

My daughter had 5 or 6 ear infections for the past 2 years. After going to pediatrician and ENT doctor we figure out that she is allergic to something (can't found out to what) and she started taking Allergra and nasal spray. Couple days ago she started pulling her ear and told me that she feel that her ear closing (blocked) and if she is pulling her ear it help to open but then it's closing again. She doesn't have any cold symptoms or any other symptoms at all. What it could be?

[specialmom]

Eustacian tube dysfunction.  (had it myself.)  Ask her if she is having that wooshing, ocean sound in her ear too when she is laying down and moves her head from side to side.  Go back to your doctor.  Why can't they find out what she is allergic to?  Perhaps an allergist could help as they do the comprehensive panels and they aren't sticks anymore.  Anyway, I'd call the ent and see what they say.  good luck.