A head injury can change a person's life, but the actions a responder takes in the first minutes can reduce the severity of the damage. This guide explains, in plain language, how to recognize a head injury, the first aid steps to take, when to call 911, how to care for a minor bump or concussion at home, and the mistakes to avoid. It's written from a paramedic's perspective, but anyone can learn these skills.

Quick answer, if someone has a head injury, you should: keep them still and protect the neck and spine, call 911 for any serious injury, control bleeding with a clean cloth (but never press hard on a suspected skull fracture), monitor their breathing and level of consciousness, and watch closely for warning signs that can develop over hours. The full steps are below.

Alert: This article is educational and is not medical advice. In a true emergency, call 911 and follow the instructions of trained professionals.

What Is a Head Injury?

A head injury is any trauma to the scalp, skull, or brain. It can be closed (a hard blow that doesn't break the skull) or open/penetrating (an object breaks the skull and reaches the brain). Common types include a concussion (the most common traumatic brain injury, where the brain is shaken), scalp wounds, and skull fractures. The danger is that bleeding or swelling inside the skull can develop even when the head looks fine on the outside, which is why monitoring matters so much.

First Aid Steps for a Head Injury

If you come upon someone who has hit their head hard, work through these steps. (For a minor bump, skip to the home-care section below.)

1. Check the scene and the person. Make sure it's safe, then check whether they're awake, breathing, and responsive.
2. Call 911 immediately for any serious head injury (see the red flags below). Put your phone on speaker so you can keep your hands free.
3. Keep them still and protect the neck and spine. Assume any serious head injury may also involve a neck or spinal injury. Have the person lie still and do not move them unless they're in danger, keep the head, neck, and spine aligned.
4. Manage breathing. If they're not breathing, begin CPR if you're trained (a CPR mask provides a safe barrier). If they're unconscious but breathing and you must protect the airway, place them carefully in the recovery position while supporting the head and neck in a neutral position.
5. Control any bleeding. Apply firm pressure with a sterile dressing or clean cloth, but do not press directly on the wound if you suspect a skull fracture, press gently around the edges instead. Don't remove an object embedded in the head, and if blood soaks through the dressing, add another on top rather than removing the first.
6. Handle the person gently and keep them comfortable. Have them lie still, keep them from getting too hot or cold (an emergency blanket helps), and reassure them. Slightly elevating the head and shoulders can help if there's no suspected spinal injury.
7. Monitor continuously. Watch their level of consciousness, breathing, and symptoms until help arrives, and be ready to report any changes to EMS.

When to Call 911 (Head Injury Red Flags)

Call 911 or go to the emergency room right away if the injured person has any of the following:

• Loss of consciousness, even briefly, or won't wake up
• Repeated vomiting
• A seizure
• Clear fluid or blood draining from the nose or ears
• Unequal pupils, or one pupil larger than the other
• A severe or steadily worsening headache
• Confusion, agitation, slurred speech, or unusual behavior
• Weakness, numbness, loss of balance, or inability to use an arm or leg
• Serious bleeding from the head or face

When in doubt, get medical help. Symptoms can be delayed, and a "minor" hit can become serious. Older adults, young children, people on blood thinners, and anyone who's been drinking are at higher risk.

How to Treat a Minor Head Bump at Home

Most small bumps, the kind from a low cupboard door or a minor fall, can be cared for at home as long as there are no red flags:

• Apply a cold compress. Wrap a cold pack or ice in a cloth (never put ice directly on the skin) and hold it on the bump for about 20 minutes to reduce swelling.
• Rest. Physical and mental rest for the first day or two helps recovery.
• Use the right pain reliever. For a mild headache, acetaminophen (Tylenol/paracetamol) is the safer choice. Avoid aspirin and ibuprofen for the first 24–48 hours, NSAIDs can increase the risk of bleeding, unless a doctor advises otherwise.
• Have someone check on them. For the first 24–48 hours, make sure another person can monitor the injured person and watch for any of the red flags above.
• Avoid alcohol, driving, and contact sports until fully recovered.

If symptoms appear or worsen, stop home care and seek medical help.

Concussion First Aid and Recovery

A concussion is a mild traumatic brain injury, and it deserves respect even when the person seems fine. After a suspected concussion:

• Stop the activity immediately. Never let someone return to sport or play on the same day, doing so risks Second Impact Syndrome, a rare but dangerous condition.
• Rest the body and the brain. Keep things quiet and calm for the first day or two, limiting screens, bright lights, and strenuous mental work, then gradually reintroduce activity as symptoms allow.
• Get evaluated. See a healthcare professional, and follow a supervised, step-by-step return-to-activity plan. If symptoms return at any step, drop back and rest.
• Avoid alcohol, recreational drugs, and sleeping pills for 48 hours, they can mask worsening symptoms.

What Not to Do With a Head Injury

• Don't move the person if you suspect a neck or spinal injury, unless they're in immediate danger.
• Don't remove a helmet (for example, on a motorcyclist) unless it's blocking the airway and you're trained to do so.
• Don't apply direct pressure to a wound where you suspect a skull fracture, and don't remove embedded objects.
• Don't give food, drink, or medication to someone with a serious head injury, they may need surgery and an empty stomach, and swallowing may be unsafe.
• Don't give aspirin or ibuprofen, they can worsen bleeding.
• Don't leave the person alone, and don't shake someone who seems dazed.

How to Prevent a Head Injury

The best treatment is prevention. A few habits dramatically lower your risk of a serious traumatic brain injury (TBI):

• Wear a properly fitted helmet, strapped on, for biking, motorcycling, skating, climbing, and contact sports.
• Reduce exposure to high-risk situations where you reasonably can, and use dedicated bike paths instead of busy roads.
• Take recent injuries seriously. After even a minor head injury, avoid activities with impact risk until you've fully recovered, a second hit before healing is far more dangerous.
• Prevent falls at home, especially for older adults and young children, with grab bars, good lighting, and clear walkways.

Recognize the Signs a Head Injury Is Getting Worse

Imagine two kids collide during soccer. Nobody passes out, but you need to keep watching. Get help right away if you notice the person:

• Starts vomiting
• Has a headache that keeps getting worse
• Has blurry vision that isn't improving
• Becomes drowsy, sleepy, or hard to wake
• Repeats questions or forgets what was just said
• Develops unequal pupils
• Feels new numbness or tingling in the limbs
• Has a change in body temperature or behavior

Even a relatively minor collision can lead to bleeding or swelling inside the skull, so don't wait for symptoms to become severe.

Know Your Local Trauma Care System

Serious head injuries often need a specialist and a higher-level trauma center, which isn't available at every hospital. It helps to know the difference between an emergency room and a trauma center and which facilities in your area can handle severe trauma, so EMS can route the patient to the most capable hospital.

Be Equipped and Trained

Gear and skills work together. Keep a stocked first aid kit at home and in the car, with compressed gauze and dressings for wound bleeding, an emergency blanket, and a cold pack. For higher-risk environments, a trauma kit adds bleeding-control supplies. Most importantly, take a CPR and first aid course, hands-on training is what turns these steps into instinct. You can also read our guides on treating eye injuries and preparing for and responding to car accidents, and browse our dressings and gauze and emergency equipment.

Frequently Asked Questions

If a patient undergoes a head injury, what should you do?

Keep them still and protect the neck and spine, call 911 for any serious injury, control bleeding with a clean cloth (but not directly on a suspected skull fracture), monitor breathing and consciousness, and watch for warning signs like vomiting, worsening headache, drowsiness, or unequal pupils. Don't move them unnecessarily or give food, drink, or aspirin/ibuprofen.

What should head trauma victims avoid?

Avoid being moved if a spinal injury is possible, returning to sport the same day, drinking alcohol, driving, and taking aspirin or ibuprofen. They should rest and be monitored for at least 24–48 hours.

What is the first aid for a bleeding head wound?

Apply firm pressure with a sterile dressing or clean cloth. Scalp wounds bleed heavily but often look worse than they are. Do not press directly on the wound if you suspect a skull fracture, and don't remove embedded objects, press around the edges and get medical help.

How do you treat a minor head bump at home?

Apply a cloth-wrapped cold pack for about 20 minutes, rest, use acetaminophen (not aspirin or ibuprofen) for pain, and have someone monitor for red-flag symptoms for 24–48 hours. Seek care if anything worsens.

Should I let someone with a head injury sleep?

Sleep is fine for a minor injury once a doctor or the red-flag list has ruled out danger, but someone should check that the person can be woken normally and is acting normally. If they can't be roused, are confused, or vomit, seek emergency care immediately.

Can I give ibuprofen for a head injury?

It's best to avoid ibuprofen and aspirin for the first 24–48 hours because they can increase bleeding. Acetaminophen (Tylenol/paracetamol) is the safer choice for pain, unless your doctor advises otherwise.

Conclusion: How to Help Someone Who Has Hit Their Head

We can't reverse the damage from the initial impact, but quick, correct first aid can prevent a head injury from getting worse. Learn to recognize the warning signs, keep the person still, control bleeding safely, monitor closely, and call 911 when red flags appear. Pair that knowledge with a good first aid kit and proper training, and you'll be ready to help when it matters most.

Alert: None of this should be taken as medical advice. If you're experiencing a true emergency, call 911 and seek professional medical care.