My 5 year old has tubes in his ear when he was about 1 years old and they came out sometime after 4 years old. Now is right ear is full of a yellowish wax build up and stinks really bad. He wants to itch at it. This just start about a month ago. He never had this yellowish wax build up before. We went to the doctor and she clean some of it out cause she could not see down his ear. She said it was a litttle red and gave him Amoxicillin. I asked why this is occuring and about the smell. I was advised that some kids that play outside get more wax buildup due to dust. My son hasnt been outside much due to a broken foot. The smells is bad enough to make you want to puke. I am thinking it is an ear infection and he needs ear drops.