Has your son been tested for Eosinophilic Esophagitis (EoE). It is a different type of allergic reaction to certain foods. First line therapy involves a six food elimination diet. I was diagnosed as an adult after years of my reflux not getting better. Started not being able to swallow well and had a food impaction. Unfortunately, definitive diagnosis requires an endoscopy with biopsies. You might want to discuss the possibility of EoE with your gastroenterologist.
Thought you would appreciate the literature below on the subject. Best of luck to you and your son.
https://www.med.unc.edu/medicine/news/chairs-corner/podcast/eoe-dellon/
https://aacijournal.biomedcentral.com/articles/10.1186/s13223-019-0336-3
Post Edited (GuitarGERD) : 3/11/2021 3:53:12 PM (GMT-7)