Concussions, in general, are not life-threatening. In most circumstances, people recover quickly and completely.
However, in some cases, the effects of a concussion can be serious. A severe traumatic brain injury (TBI) increases the future risk of several neurodegenerative diseases (diseases that affect the brain nerves) such as Alzheimer’s disease, Parkinson’s disease, dementia and amyotrophic lateral sclerosis (ALS)
One may not understand the seriousness of the concussion immediately after an injury and must keep a check on the signs and symptoms up to a few days after the event.
A visit to the emergency department is recommended if any of the concussion signs or symptoms get worse, for instance,
Prolonged severe headache
Repeated vomiting or nausea
Loss of consciousness (more than 30 seconds), and
Increased confusion