Will I get CTE from one concussion?

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A concussion is caused by a jolt to the head or the body that makes the brain move rapidly in the skull, leading to a variety of symptoms (e.g., “seeing stars,” headache, dizziness, nausea, vomiting, trouble sleeping, fatigue, confusion, difficulty remembering and concentrating). Less than 10% of concussions involve loss of consciousness or blacking out. Concussion symptoms can occur immediately after impact or can be delayed for hours. Most people fully recover from the symptoms of a concussion in 1-3 weeks. Although a concussion should be taken seriously and diagnosed and monitored by trained clinicians, it is important to note that a single concussion (e.g., from a fall or other accident) will not lead to CTE. The risk for CTE appears to be from experiencing repetitive concussive and subconcussive hits over a period of time.