What's Up Doc
Glue Ear is an icky problem that lots of kids (and sometimes adults) have where the inner ear gets filled with a sticky fluid.
This glue-like stuff stops the ear from working as normal, and tends to result in muffled sounds from the affected ear (or none at all).
If you have it, there is no need to worry. It usually goes away by itself - but even if it doesn't, we can fix it very easily.