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This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.

Medically reviewed by WellAlly Editorial TeamLast reviewed October 19, 2026Editorial policy
First Aid15 min read

Recognizing Head Injury Warning Signs and Emergency First Aid

Published: October 19, 2026Updated: October 19, 2026

Head trauma ranges from superficial scalp lacerations to severe traumatic brain injuries that require urgent surgical evaluation. Recognizing key danger signs—such as worsening confusion, repeated vomiting, or unequal pupils—ensures timely, lifesaving care. This guide outlines how to safely assess a head injury, stabilize the patient, and act on life-threatening red flags.

Quick Summary

Call emergency services immediately if a head injury results in loss of consciousness, repeated vomiting, unequal pupils, seizures, or fluid draining from the nose or ears.

Important Medical Disclaimer

This guide is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always consult with qualified healthcare providers for medical concerns.

Step-by-Step Guide

1

Assess Responsiveness and Protect the Cervical Spine

Check immediately to see if the person is alert, responsive to verbal cues, and capable of answering simple questions. If the trauma resulted from a high-energy mechanism such as a fall from height, bicycle crash, or motor vehicle collision, assume a potential neck injury. Keep the person still and manually support the head and neck in a neutral position to prevent movement.

Important: Do not move, bend, or twist the person's head or neck unless necessary to clear an obstructed airway.

2

Identify Critical Red Flags Requiring Immediate 911 Call

Perform a rapid visual screen for symptoms indicating intracranial pressure or severe brain trauma. Call 911 immediately if you observe unequal pupil sizes, repeated vomiting, seizures, worsening confusion, or clear watery fluid draining from the nose or ears. Any loss of consciousness lasting more than a few seconds, or an inability to wake the person, mandates emergency medical response.

Important: Never leave an unconscious, seizing, or rapidly deteriorating patient unattended.

3

Control External Bleeding with Appropriate Technique

The scalp contains a rich blood vessel network and often bleeds heavily even from minor cuts. Apply firm, steady pressure directly over the bleeding site using a sterile dressing or clean cloth. If you detect bone fragments, an open wound with visible tissue, or an indented area in the skull, do not apply direct pressure into the depression.

Important: Avoid pressing directly on a suspected skull fracture, and never attempt to remove any impaled or penetrating objects.

4

Apply Cold Therapy to Localized Swelling

For closed injuries presenting with swelling or localized hematomas ('goose eggs'), apply a cold pack wrapped in a thin cloth or towel to the affected area. Maintain the cold application for 15 to 20 minutes at a time to reduce tissue edema and provide localized pain relief. Ensure the cold pack is not applied directly to bare skin to prevent cold-induced tissue injury.

5

Avoid Blood Thinners and Sedatives

Do not administer nonsteroidal anti-inflammatory drugs (NSAIDs) such as ibuprofen, aspirin, or naproxen immediately following a blunt head injury. These medications impair platelet function and increase the risk of worsening an intracranial bleed. Additionally, avoid sedatives, narcotics, or alcohol, which can mask changes in neurological status and cognitive responsiveness.

Important: Do not take aspirin or ibuprofen after a head injury without medical clearance, as they can accelerate internal brain bleeding.

6

Maintain Continuous Neurological Observation for 48 Hours

Subdural and epidural hematomas may expand gradually over several hours or days before producing overt symptoms. Keep the person under close observation for at least 24 to 48 hours, checking regularly for new-onset slurred speech, worsening headache, or gait instability. While resting is encouraged, you should periodically verify that the person can be easily roused and remains oriented to person, place, and time.

Frequently Asked Questions

Is it safe to let someone sleep after a head injury?
Yes, sleep is safe and necessary for brain recovery once an emergency injury has been excluded. However, during the first 24 hours, you should gently wake the person every 2 to 3 hours to confirm they rouse easily, recognize you, and speak coherently.
What does clear fluid draining from the nose or ear indicate?
Clear, watery fluid draining from the nose or ears can be cerebrospinal fluid (CSF), indicating a basilar skull fracture that has compromised the protective membranes around the brain. This is a medical emergency requiring immediate 911 activation.
When does a head bump require an emergency department evaluation in children?
Seek emergency care if a child loses consciousness, vomits more than once, cries inconsolably, exhibits abnormal lethargy, has a bulging soft spot (in infants), or experienced a fall from greater than three feet.
What is the difference between a concussion and a contusion?
A concussion is a functional, temporary disruption of brain activity caused by rotational or blunt force, often not visible on standard CT scans. A contusion is a physical bruise or bleeding on the brain tissue itself, which is a structural lesion visible on imaging.
  1. 1
    CDC HEADS UPSource
  2. 2
    Mayo ClinicSource
  3. 3
    NHSSource

Click any link to access the full source. PubMed Central (PMC) links provide free full-text access.

Medical Disclaimer

This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.

If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.

Medically reviewed by WellAlly Editorial Team Last reviewed October 19, 2026. · Read our editorial policy