Medical Author: Melissa Conrad Stöppler, MD
A concussion is a form of minor brain trauma in which the function of the brain becomes altered but no abnormalities can be detected by imaging tests such as CT scans. Symptoms of a concussion are typically short-lived and go away on their own. The symptoms may be obvious or may be so subtle that the affected person does not realize they have suffered a concussion. Some of the more common symptoms of concussion include
- feeling foggy, or that one's thinking is slowed or altered,
- irritability or emotional changes,
- problems concentrating or remembering new information.
Sometimes people with a concussion will lose consciousness (pass out), but this does not happen in most cases. Not all symptoms of concussion will occur in every case; sometimes the symptoms differ depending on the location and extent of the injury. For example, some people suffering from a concussion may sleep excessively while others have insomnia. Symptoms of concussion can last for days, weeks, or occasionally even longer.
Kasper, D.L., et al., eds. Harrison's Principles of Internal Medicine, 19th Ed. United States: McGraw-Hill Education, 2015.
United States. Centers for Disease Control and Prevention. "Facts About Concussion and Brain Injury." <http://www.cdc.gov/concussion/pdf/Fact_Sheet_ConcussTBI-a.pdf>.
Main Article on Concussion Symptoms and Signs
Pictures, Images, Illustrations & Quizzes
Concussion: Test Your Knowledge of Traumatic Brain Injury
What is a concussion? Learn causes, symptoms, and treatments of this very common traumatic brain injury by taking this quick quiz....
Concussions & Brain Injuries: Symptoms, Tests, Treatment
Concussions are a common type of traumatic brain injury. Read more about symptoms of a concussion, how to treat head injuries,...
Sports Injuries: Types, Treatments, and Prevention
Learn about common sports injuries types, treatments, and prevention. Can you heal a pulled muscle in the back, neck, lower back...
Other Causes of Concussion Symptoms and Signs
- Blurred Vision
- Difficulty Concentrating
- Difficulty Remembering New Material
- Difficulty Thinking Clearly
- Feeling Slowed Down
- Increased Sleeping
- Loss of Consciousness
- Memory Loss
- Mental Fogginess
- Mood Changes
- Sensitivity to Bright Lights
- Sensitivity to Loud Sounds
- Slower Reaction Times
Subscribe to MedicineNet's General Health Newsletter