I had this problem when i was 2 till now and i am now 19. The thing is most doctors dont think anything is wrong, I was sent to a Ear,Nose and Throat Doctor, I was having problems hearing, tons of earaches, and problems with driange, I ended up having to have Tubes put into my ears, they put you to sleep put a hole in your ear drum and then insert a T tube and it allows the pressure to flow out and also allows drainage and improved hearing, It worked for me and i have had them since i am 2 years old and now being 19 i just had another set put in in Nov because a doctor thought i would be okay to go without them and i started having ear problems and pressure biuld up again, Now i am hearing better again and have no pressure problems, You may check with an Ear, Nose Throat doctor about this, I think your Child is in need of Tubes.