My almost 6 year old daughter had a constant runny nose, fever and sore throat at least twice a month and enlarged tonsils. My family used to be like "Oh Kaydie has a cough? When does Kaydie not have a cough?" Well I took her to an ENT and turns out tonsils needed to come out. I had asked the ENT if he could do the adenoids too because I thought she had allergies and best to get it all done at once if it's something she was going to need in the future. He said if they're enlarged I'll take them.
Well it turns out after he had gotten in there he saw that the adenoids were so enlarged that they were completely blocking her airway. Her constant runny nose...gone. Constant fevers...gone. Cough...gone. Snoring...gone. It's amazing, the child would literally be sick at least twice a month with a fever of 104, and I think she has maybe been sick 3 times since then and had 1 fever. She was 4 1/2 when she got it done and let me tell you it was the best decision I ever made. And my son had tubes put in the same day. He was 1 1/2. It's really less traumatic for them than you think. They think it's cool and its over before you know it. Also the adenoids is a decently painless recovery too. Good luck!