What is a concussion?
A concussion is an injury after a head or body impact that can temporarily affect brain function.
Symptoms, causes and assessment
Headache, dizziness, nausea, light sensitivity or trouble concentrating may occur; loss of consciousness is not required. Symptoms can emerge later. Immediate return to sport or work may be unsafe.
Care and when to seek help
Repeated vomiting, worsening headache, seizure, pronounced drowsiness or limb weakness needs emergency care. Rest and gradual return should be tailored with a clinician.
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