What are the symptoms of a concussion?

You do not have to lose consciousness to have a concussion, making it hard to know if you have suffered one. Concussion symptoms can range from mild to severe and can last anywhere from a few hours to several months. Here are some possible symptoms:


  • Headache or dizziness that will not subside
  • Nausea and vomiting
  • Sensitivity to light and sound
  • Blurred vision
  • Balance problems
  • Cognitive problems such as an inability to concentrate or remember (some patients complain of being slower or not thinking clearly)
  • Mood problems such as being overly angry, anxious (nervous), sad, or depressed
  • Changes in sleep patterns, (e.g., difficulty falling asleep, sleeping more or less than usual).

If you observe or suspect any of these symptoms, contact your doctor immediately.

Click here to access the Centers for Disease Control’s “Brain Injury Basics,” an excellent resource on brain injury.

Check out this video on concussions.