A concussion is a form of traumatic brain injury (TBI) that affects how your brain functions. These effects can be short-term, lasting only a few hours or days, or can lead to long-term problems.

If you’ve ever had a head injury or suspected concussion, you may have been warned to stay awake for several hours or to have someone wake you up every hour. This advice stemmed from the belief that ...

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A concussion makes the brain move suddenly inside the skull after a head hit or a hard body blow. Symptoms can last days to months. Most symptoms start improving within 1 to 2 weeks of the injury, ...

A concussion is a traumatic brain injury (TBI) that is caused by a blow to the head or body that can lead to a range of symptoms, including persistent headache, dizziness, and problems with memory or ...

Post-concussion syndrome (PCS) is a condition in which the symptoms of concussion or a head injury last long after the initial injury. PCS can last for months or years, but the symptoms improve over ...

Every year, almost half a million (PDF) children across the United States visit emergency rooms for concussions. But recent studies find that number may undercount just how many kids really have ...

A person with a concussion may have dilated pupils, droopy eyelids, or difficulty tracking objects. Sometimes, these symptoms are obvious, but not always. Assessment tools can help a doctor check for ...

A concussion, or mild traumatic brain injury (TBI), happens when a blow or jolt to the head or body causes the brain to move rapidly back and forth inside the skull. Concussions are considered a “mild ...