Welcome to Healing Well, Mommy!
We unfortunately can't give medical advise, as we are not doctors. However, we can speak from personal experience. As a mother myself, I do understand your fears and helplessness. I have many medical problems, and many things come into my mind both as a mother of an asthmetic/special needs kid, but also as my very poor health and my employment.
Have you considered other doctors besides ENTs? Perhaps an Pediatric Pulmonologist? A Pediatric Rheumy? A Teaching Hospital? You also said it probably wasn't acid reflux (gerd) or a food allergy due to medications not being effective. A true food allergy would have more symptoms than coughing. For example, I am allergic to bees. If a bee stings me, I have 20 minutes before I start losing oxygen. I have to inject an epi-pen in my thigh. I also break out in head to toe hives, turn red as a lobster (no joke, I even became a medical case on students because of how red I turned in the ER). I swell up too. I also am allergic to pollen, I itch and break out in hives. For allergy reactions, one has to have some sort of an ana pfft someone please finish the word I cant spell. You know that one ingredient in Benedryl (now that I can Spell uh maybe.) In my case, I win an epi injection with 60mg of benedryl loading dose, then 20mg every 4 hours til symptoms disappear.
Have you considered xrays of his/her sinus cavities to see if something is wrong? Have you tried an allergy test for common allergies? Like pollen or nuts, so on.
Intolerances. Have you considered writing down everything he eats, drinks, medications daily? For example, I am lactose intolerant. If I have icecream I gas, not any gas, but almost as bad as a skunk or the ole' gas room training in the military! I have been known to run kids out of the room. It is also a perfect cover when the kids don't listen.. I pull out the icecream and grab a bowl, put some in it and start act like I'm gonna eat it and say "Would you like me to sleep in the same room as you tonight or would you rather listening to me?" Works like a charm...When they behave I pick a winner on who eats it. Now I hardly grab the icecream cuz I have them feared for their noses LOL. Some people get stomach aches, gas, sharp pains, cough, vomiting, so on for an intolerance.
Pulmonology. Well, basically its a breathing specialist. They cover asthma, copd, so on. They can run tests to see if it is asthma. A few key triggers in my son is when he is coming down with something, he tends to cough more and have more attacks. Mold is a big trigger, so is running. Is there something your child does routinely before this happens?
Sinuses. I have a friend who have to have her sinuses reconfigured. She breathed really hard til her surgery.
Rheumy doctor. They cover a wide range of auto immune diseases. Some auto immune diseases such as Ehlers-Danlos syndrome can cause those symtops. How I know, sometimes I cough on my food as a result as it. I take extra small bites to lessen the chance of choking when I eat now. I also sometimes have food go down the wrong pipe.
Teaching Hospitals. I love the teaching hospital I go to. They cover head to toe. They don't give up on you either. My favorite - they try to treat the problem not just symptoms.
It is extremely RARE for minor heart diseases to cause coughing like that too, however, it could happen. My grandmother was one of the one in million people to suffer, sadly, she passed on from dementia and old age last year.
Acid reflux. Bananas are evil to me, especially if I eat them at night. I love them too! They give me coughing and acid reflux. I get the same problem with oranges, cucumbers, tomatoes, a lot of fruits and veggies. I have news for those fruits and veggies - they better still run, cuz my mouth is gonna get them. I love my veggies and fruits. I'll suffer with the consequences. I had two choices, give it up or suffer so I chose to suffer. I'd be 10 feet under before I give up bananas and tomatoes.
~Moderator - Allergies & Asthma , Alzheimer's~
"The Walking Medical Mystery"/~Medical Caregiver and Doctors Worse Nightmare~/ And Doctor's Worse Nightmare DX: Lactose Intolerance, Gluten Sensitive, ADD, Fibromyalgia, Carpel Tunnel, Arthritis, Clasterphobia, Anxiety, Diabetes Type II, Grave's Disease, Tachycardia, GERD, PCOS, Migraines, UARS, Anterior Scleritis, Orbital Tumor