To the Editor I read with interest the Viewpoint recently published in JAMA Pediatrics expressing frustration with the term functional pain to describe the common scenario of chronic pain from unidentified causes.1 However, I question the author’s recommendation to change the name to primary pain disorder.1 Just because the cause of a symptom is unknown does not mean that it has no cause; absence of proof is not proof of absence. Diagnostic delay is common in complex illnesses and not all patients have access to comprehensive diagnostic evaluations.
Oaklander AL. Pain Terminology. JAMA Pediatr. 2014;168(12):1167. doi:10.1001/jamapediatrics.2014.1775