Head injury and concussion

Also called Concussion or Mild traumatic brain injury

Head injuries are common and most are not serious. Concussion is a temporary change in how the brain works after a blow to the head, which can cause headaches, dizziness, feeling sick and problems with memory or concentration. Symptoms usually improve within 2 weeks, but can last longer.

Last updated Nov 9, 2026

What it is

Rest, avoiding screens and alcohol for a while, and a gradual return to work, school and sport help recovery.

Someone should stay with you for the first 24 hours after a head injury in case symptoms get worse.

Common signs

  • Headache
  • Dizziness or feeling sick
  • Confusion or memory problems
  • Feeling dazed
  • Sensitivity to light or noise
  • Tiredness and irritability

How it is usually diagnosed

  • Examination and questions about the injury
  • A CT scan if there are warning signs

Records worth keeping

Keeping these together makes each appointment easier, especially when you see a new doctor:

  • Emergency department letters
  • Scan reports
  • Notes on symptoms and recovery
  • Return-to-sport plans

Questions to ask your doctor

  • When can I go back to work, school or sport?
  • What symptoms mean I should come back?
  • What if symptoms last more than a few weeks?

When to get help right away

Call 112 or go to the nearest emergency department if you have:

  • Loss of consciousness, a seizure, repeated vomiting, worsening headache, confusion or clear fluid from the nose or ears: call 112

This page is general information. It is not a diagnosis and does not replace a doctor who knows your history. Medfold keeps your records organised; it does not interpret them.

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