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Intracranial Hematoma: Recognizing the Danger Signs and Acting Fast

An intracranial hematoma is a pool of blood trapped inside the skull that presses on the brain and can be fatal without rapid treatment. It often follows a fall or head bump—sometimes a minor one—and is especially dangerous in older adults and anyone on blood thinners. Symptoms can be delayed for hours, so knowing the red flags and calling 911 quickly can save your loved one's life.

Key points

  • An intracranial hematoma is a life-threatening blood collection inside the skull that presses on the brain and requires immediate medical attention.
  • Symptoms can be delayed—a person may seem fine for hours (the lucid interval) before suddenly worsening. Never assume they are safe.
  • Red flags: loss of consciousness, worsening headache, vomiting, one-sided weakness, blurred vision, trouble walking, sudden confusion, extreme sleepiness, or trouble speaking—call 911 for any of these.
  • Older adults are higher-risk because of brain shrinkage, fragile stretched veins, and frequent use of blood thinners; even a minor fall can cause a serious bleed.
  • In dementia, hematoma signs can mimic a bad day—any sudden behavior or thinking change after a fall must be evaluated.
  • If your loved one is on blood thinners, take them to the ER after any head injury, even if they seem fine.
  • Do not give aspirin or ibuprofen after a head injury, and call 911 rather than driving when symptoms are severe.
  • Prevention matters: fall-proof the home, use seat belts and helmets, and supervise children around stairs and furniture.

Understanding the situation

Because the skull is a hard, fixed container that cannot expand, even a small amount of bleeding inside it raises pressure on the brain and can damage brain cells, cause loss of consciousness, or lead to death. The most common trigger is a head injury from a fall, car accident, or sports impact, but a blood vessel can also burst on its own from high blood pressure, a tumor, or a bleeding disorder. Older adults are at much higher risk: aging shrinks the brain and stretches the fragile bridging veins so they tear easily, and many seniors take blood thinners that make any bleed harder to stop. The most dangerous trap is the 'lucid interval'—the person seems completely fine after the hit, talking and walking normally, while the hematoma quietly grows, then suddenly collapses hours later. In someone with dementia, the warning signs (new confusion, agitation, sleepiness) look exactly like a bad dementia day, so they are dangerously easy to miss. A slow bleed called a chronic subdural hematoma can build over weeks and mimic worsening dementia—and can improve dramatically if the blood is drained.

General caregiving information, not medical advice. Check medications and major care changes with your clinician.

Step-by-step

  1. Act on ANY red flag after a head injury (or even without one): loss of consciousness even briefly, a headache that worsens or won't quit, repeated vomiting, weakness or numbness on one side, blurred or double vision, trouble walking or balancing, sudden confusion, extreme sleepiness, or trouble speaking. Call 911 immediately.

  2. When you call 911, say clearly that you suspect a brain bleed (intracranial hematoma), state the time of the fall, and report every blood thinner the person takes (for example warfarin, apixaban, rivaroxaban, clopidogrel, or aspirin).

  3. Do NOT drive a severely symptomatic person yourself—EMS can begin care en route and alert the hospital, and you risk harm if they lose consciousness in the car.

  4. While waiting for EMS, keep the person calm and still. Give nothing to eat, drink, or swallow as medication—food or fluid can complicate emergency surgery.

  5. If the person is unconscious but breathing, gently roll them onto their side into the recovery position to keep the airway clear, and stay with them until help arrives.

  6. If a seizure happens, clear hard or sharp objects away from them, do not restrain them, time how long the seizure lasts, and call 911 immediately if it runs longer than 5 minutes or they don't regain consciousness—a seizure can signal a growing hematoma.

  7. If the person seems fine, stay with them and check alertness every 2 hours for 24 hours, including overnight. Ask their name, where they are, and what happened. If they are hard to wake, confused, or worsening, call 911.

  8. If your loved one is over 70, takes blood thinners, or has a history of falls, take them to the ER after ANY head bump even when they look fine—a CT scan can catch a bleed before symptoms turn severe.

  9. At the ER, hand over the medication list, report the injury time and exact symptoms, and ask directly for evaluation for an intracranial hematoma with a head CT.

  10. After the emergency, follow up with a neurologist. Even small bleeds need monitoring, and ask specifically about chronic subdural hematoma, which can develop slowly and look like dementia.

What not to do

  • Do not assume a head injury is harmless just because the person never lost consciousness or is now talking and walking—the lucid interval can last minutes to hours, and many serious bleeds in older adults follow only minor bumps.

  • Do not give aspirin, ibuprofen, or naproxen after a head injury—these thin the blood and can worsen bleeding. Avoid all pain relievers until a doctor clears them.

  • Do not let the person sleep for long stretches without waking them roughly every 2 hours to check orientation; if they are hard to rouse or confused, call 911.

  • Do not blame sudden confusion, lethargy, or agitation in a person with dementia on 'just their condition' after a fall—always get it checked.

  • Do not drive yourself or your loved one to the hospital when symptoms are severe—call 911 instead.

  • Do not wait to see if symptoms improve before seeking help.

Practical tools

  • Watch and Wake Checklist (24-hour monitoring)

    Print and post where it's visible, or keep it in your care notebook. After a head bump, check the person every 2 hours for 24 hours—including overnight. At each check confirm: (1) Can they state their name, where they are, and what happened? (2) Are they awake and alert? (3) Worsening headache? (4) Vomiting? (5) One-sided weakness? (6) Blurred vision? (7) Trouble walking? (8) Unusual confusion or sleepiness? Any 'yes' to a danger sign—or trouble waking—means call 911.

  • BE FAST Mnemonic for Hematoma

    A hematoma often mimics a stroke, so use the same fast check: Balance (sudden trouble walking or staying steady), Eyes (blurred or double vision), Face (drooping, ask them to smile), Arms (weakness—ask them to raise both arms and watch for one drifting down), Speech (slurred or trouble understanding), Time (call 911 the moment you see any of these). Treat it with the same urgency as a stroke.

  • Seizure Response Protocol After Head Injury

    If the person has a seizure: clear away nearby hard or sharp objects so they can't injure themselves, do not hold them down or put anything in their mouth, and note the start time. Time the whole event. Call 911 immediately if the seizure lasts longer than 5 minutes or the person does not regain consciousness afterward. A new seizure after a head injury can mean the hematoma is growing—report it to EMS.

  • Recovery Position for an Unconscious Person

    If the person is unconscious but breathing while you wait for EMS, gently roll them onto their side, tilt the head slightly back to keep the airway open, and bend the top knee forward to stabilize them. This prevents choking if they vomit. Stay beside them, keep watching their breathing, and do not give anything by mouth.

  • ER Handoff / 911 Script

    Read this aloud so nothing is forgotten under stress: 'My loved one fell and hit their head [how long] ago. They take [list blood thinners]. They now have [specific symptoms]. I am worried about a brain bleed—please evaluate for an intracranial hematoma with imaging.'

  • Lucid Interval Warning Script

    When the person feels fine right after a head injury, say: 'I'm glad you feel okay now, but symptoms from a head bump can show up later. I'll check on you every couple of hours today. If you get a headache, feel sick, or feel confused, tell me right away—I'm here to help.'

  • Medication List Card for the ER

    Keep a current card listing every prescription, over-the-counter drug, and supplement, with blood thinners and bleeding-risk supplements (fish oil, vitamin E, ginkgo, aspirin) highlighted. Keep one copy in your wallet and one on the person, so you can hand it to paramedics or the triage nurse within seconds.

  • Emergency Contact Card for Head Injuries

    A small wallet/purse card. Side 1: 'I have had a head injury. If I am confused, sleepy, or have a bad headache, call 911. I take: [list blood thinners].' Side 2: caregiver and primary care phone numbers. Useful if the person forgets the injury happened or is found by someone else.

  • Family and Aide Alert Note

    Share a short note with every relative, neighbor, and home care aide explaining the lucid interval (seems fine after a fall, then declines hours later) and the standing rule: any new confusion, sleepiness, or unsteadiness after a fall means call 911 immediately—do not wait and see.

  • Fall Prevention Home Audit

    Go room by room to prevent the next head injury: remove loose rugs and clutter from walking paths, add grab bars in the bathroom and near the bed, brighten night lighting in hallways and the bathroom, place non-slip mats in the shower, and confirm any cane or walker is the correct height and used correctly on every outing. Consider a fall-detecting medical alert system for someone who lives alone.

Write down the exact time of the fall the moment it happens—the ER will ask, and it guides their decisions.

Keep the medication list and emergency contact card prepared in advance so you're not scrambling during a crisis.

Set phone alarms for the every-2-hour overnight wake checks so you don't sleep through one.

If you're unsure whether a change is 'just dementia' or something new, treat it as new and get it checked—erring on the side of caution is correct here.

Choose a hospital with a stroke protocol or neurocritical care team when possible; they can treat a bleed faster.

Brief everyone who spends time with your loved one on the lucid interval rule, so a fall on someone else's watch still triggers fast action.

Discuss with your clinician

Ask the doctor: 'Given my loved one's age and medications, what is their specific risk for a brain bleed after a fall, and what's our plan for when to go to the ER?' For someone on blood thinners: 'What should I do immediately after a head injury, and should we have a reversal agent or plan?' Ask: 'What are the signs of a chronic subdural hematoma, how does it differ from dementia, and what's the treatment and follow-up?' On pain relief: 'After a head injury, is acetaminophen safe? Under what specific conditions, if ever, would you clear aspirin or ibuprofen?' Ask the pharmacist whether any OTC drugs or supplements (fish oil, vitamin E, ginkgo) are raising bleeding risk. Ask the primary care doctor whether blood thinners should be adjusted to reduce fall-related bleeding risk and what the trade-offs are. Always confirm any medication decision with a clinician—never start, stop, or change doses on your own.

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