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Post-concussion syndrome

Post-concussion syndrome is a complex disorder in which various symptoms — such as headaches and dizziness — last for weeks and sometimes months after the injury that caused the concussion.

Concussion is a mild traumatic brain injury, usually occurring after a blow to the head. Loss of consciousness isn't required for a diagnosis of concussion or post-concussion syndrome. In fact, the risk of post-concussion syndrome doesn't appear to be associated with the severity of the initial injury.

In most people, post-concussion syndrome symptoms occur within the first seven to 10 days and go away within three months, though they can persist for a year or more.

Post-concussion syndrome treatments are aimed at easing specific symptoms.


Symptoms Causes Risk factors Prevention

Post-concussion symptoms include:

  • Headaches
  • Dizziness
  • Fatigue
  • Irritability
  • Anxiety
  • Insomnia
  • Loss of concentration and memory
  • Noise and light sensitivity

Headaches that occur after a concussion can vary and may feel like tension-type headaches or migraines. Most, however, are tension-type headaches, which may be associated with a neck injury that happened at the same time as the head injury.

In some cases, people experience behavior or emotional changes after a mild traumatic brain injury. Family members may notice that the person has become more irritable, suspicious, argumentative or stubborn.

When to see a doctor

See a doctor if you experience a head injury severe enough to cause confusion or amnesia — even if you never lost consciousness.

If a concussion occurs while you're playing a sport, don't go back in the game. Seek medical attention so that you don't risk worsening your injury.


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