Post-Concussion Syndrome (PCS) is a complex disorder characterized by a range of physical, cognitive, and emotional symptoms that persist beyond the typical recovery period following a concussion. This paper will explore this novel perspective on PCS, discussing the potential implications for understanding the underlying mechanisms of PCS and informing the development of more effective treatments. We will delve into the key components of the Functional Neurological Disorder Model (FND) model and the Free Energy Principle (FEP), discuss how these components relate to PCS, and propose a potential FND model for PCS based on the FEP. We will also discuss potential treatment implications, suggesting how interventions could be tailored to help the brain recalibrate its predictive coding and develop more adaptive responses. By providing a novel perspective on PCS, this paper aims to stimulate further research into the underlying mechanisms of PCS and contribute to the development of more effective treatments for this complex disorder.