What common symptom indicates a concussion?

A persistent headache is a common symptom indicating a concussion because it often reflects the underlying changes in brain function that occur after a head injury. Concussions can disrupt normal brain activity, leading to various neurological symptoms, and headaches are one of the most frequently reported effects. They can manifest immediately after the injury or may develop over time, serving as a crucial sign for medical professionals to consider when assessing a patient for potential concussion. Recognizing this symptom is essential in guiding further evaluation and management, as well as in determining when an athlete may safely return to play.