Concussions and post-concussion symptoms significantly impact the brain’s ability to process and integrate sensory information, leading to a phenomenon termed “internal fake news.” This occurs when altered sensory perceptions distort internal models, affecting decision-making and leading to a cascade of negative consequences including chronic stress, anxiety, and depression. The cerebellum’s role in integrating multisensory information is crucial for updating these internal models accurately. Disruptions in this process, commonly seen in concussion patients, result in a vicious cycle of emotional disturbances. Early intervention and a multidisciplinary approach are essential for mitigating these effects and supporting recovery.