The majority of symptoms are largely gone in about half of people with concussion one month after the injury, and about two thirds of people with minor head trauma are nearly symptom-free within three months.
Majoriteten af symptomer er stort set væk i halvdelen af folk med hjernerystelsen en måned efter skade, og omkring to tredjedele af folk med et mindre hovedtrauma are næste symptomfri inden for tre måneder.