Concussion
A concussion is a type of brain injury caused by a blow to the head or body that results in the brain moving rapidly within the skull. Symptoms can vary widely and may affect thinking, memory, or mood. Recovery times differ among individuals, and rest is often part of the recovery process.
Injuries & Trauma- What happens in my brain when I have a concussion?MedlinePlusMay 2026
When you get a concussion, a hit to your head causes your brain to move rapidly back and forth inside your skull. This sudden movement can make your brain bounce around or twist, which creates chemical changes and can stretch and damage brain cells.
- How is a concussion different from other head injuries?MedlinePlusMay 2026
A concussion is a specific type of brain injury that involves a short loss of normal brain function from a hit or impact. While doctors sometimes call it "mild," concussions can still be serious even if they're not life-threatening.
- Why do concussions sometimes take days or weeks to show symptoms?MedlinePlusMay 2026
Symptoms may not appear right away because it takes time for the chemical changes and damage in your brain to cause noticeable effects. Symptoms can start days or weeks after the injury as your brain begins to heal.
- Am I at higher risk for another concussion if I've had one before?MedlinePlusMay 2026
Yes, research shows that people who have had a concussion before may be at higher risk for another one. This is why it's important to protect your head and follow safety guidelines after recovering from a concussion.
- Will I need imaging like an MRI or CT scan?MedlinePlusMay 2026
Your doctor will decide if you need imaging based on your symptoms and exam findings. Not all concussions require MRI or CT scans, but they may be ordered if you have serious symptoms like worsening headaches or loss of consciousness.