Concussion Symptoms

A concussion is an injury to the head that causes instant loss of awareness or alertness for a few minutes up to a few hours after the injury.

Mild concussion

Seek immediate attention if there is a cut or raised bump at the impact site, which may also be accompanied by these symptoms:

  • Blurred vision
  • Change in sleep patterns or lethargy
  • Dizziness, lightheadedness, problems with balance
  • Headache
  • Irritability and confusion
  • Nausea or change in sense of taste
  • Problems with memory or concentration
  • Sensitivity to noise and light
  • Tinnitus (ringing in the ears)

Moderate or severe concussion

Seek immediate attention if the head injury also includes these symptoms:

  • Blood or clear fluid draining from ears or nose
  • Difficulty walking or speaking
  • Loss of consciousness or coma
  • Open wound or object penetrating the head
  • Repeated vomiting
  • Seizure or vegetative state
  • Severe headache that does not go away
  • Short-term memory loss
  • Uneven pupils