My daughter had these issues but is. 7. She ended up having her tonsils and adenoids removed, as well as the tubes put in her ears, and has been fine since. She only has one tube left and the other fell out but no more issues.

I would also consult an allergist to see if something else is going on. My son has very bad allergies but has not needed the tubes just allergy meds.

I will bet you are chronically using antibiotics like amoxicillin. if this is true his body is fighting a constant infection, I would help his body by boosting the immune system- pro-biotics and acidophilus, get a multi-vit and vit D = C and B12 going. It will take time for his body to build up and fight. Do see the Allergist, and look into food allergies as well. the infections prolonged are a concern does he get high fevers?

I would see an allergist and see if you can address the underlying issues before having ear tubes that are mostly just going to manage the symptoms.