IGHE and psychiatric disorder: FD affect 25%–45% of the general pediatric population, 80% of children with developmental disabilities, and 40%–70% with chronic conditions (such as disorders that affect oral, nasal, or pharyngeal function, aerodigestive disease or neurologic, developmental, and psychiatric disorders),11 while in IgE and non‐IgE mediated food allergy, prevalence ranges from 13.6% to 40%.2