A brain bleed from a fall or blow to the head is a medical emergency. Most people know to go to the hospital after a bad head injury because of a possible concussion, but a far more urgent risk is often overlooked: a brain bleed. A concussion is serious yet usually treatable with rest, while a brain bleed can turn a sore head into a life-threatening situation within hours. The warning signs are distinct enough to recognize, and knowing them can be the difference between life and death. If you notice any of them after hitting your head, call 911 right away.
When to Call 911
Call 911 or go to the nearest emergency room after a head injury if you notice any of the warning signs described below, especially a severe or worsening headache, repeated vomiting, a seizure, one-sided weakness, slurred speech, confusion, or loss of consciousness. A brain bleed cannot be treated at home, and when one is possible, it is always safer to be evaluated than to wait.
What Is a Brain Bleed?
A brain bleed can occur after severe head trauma, or from a brain tumor or aneurysm. Depending on where it happens, it may be called an intracranial (within the skull) or intracerebral (within the brain) hemorrhage. In each case, blood accumulates in or around the brain because of internal trauma.
Bleeding inside the skull is especially dangerous because the brain is highly sensitive, and the pressure from even a small bleed can cause major disruption. If a major artery is involved, the result can be a hemorrhagic stroke, an emergency that is often not survived; one study estimates the survival rate at around 30%. Because the skull is rigid, that rising pressure has nowhere to go, which is why a brain bleed is always treated as an emergency.
Brain Bleed Symptoms After Hitting Your Head
A brain bleed is not always fatal, but it has to be caught in time. The warning signs fall into a few groups, and any of them after a major head injury is a reason to get to an emergency room. Tell the medical team which symptoms you have noticed and when they started.
Severe or Worsening Headache
A headache is the most common early sign of a brain bleed. What sets it apart is its intensity or its trajectory: it may come on suddenly and feel like the worst headache of your life, or it may start mild and steadily worsen as blood collects and pressure builds. A headache that keeps escalating after a head injury should never be waited out.
Neck Pain and Stiffness
Pain or stiffness in the neck, sometimes with an accompanying backache, can follow bleeding around the brain and upper spine. Because a neck injury and a brain bleed can happen in the same fall, new neck stiffness after hitting your head is worth taking seriously rather than dismissing as a simple strain.
Vision Changes and Light Sensitivity
Pressure on the parts of the brain that process sight can blur or double your vision, cause partial or total loss of vision in one or both eyes, or make light suddenly painful (photophobia). Any abrupt change in how you see after a head injury is a red flag.
Weakness or Numbness on One Side
One-sided weakness is a hallmark of both brain bleeds and strokes. Because each side of the brain controls the opposite side of the body, a bleed on one side can leave the face, arm, or leg on the other side weak, numb, or drooping. This is one of the clearest signals that the brain itself is affected.
Slurred Speech and Confusion
Trouble getting words out, garbled or unintelligible speech, difficulty understanding others, disorientation, or sudden changes in behavior all point to disrupted brain function. A person who seems confused, unusually irritable, or unlike themselves after a head injury needs prompt evaluation.
Nausea, Vomiting, and Lethargy
Rising pressure inside the skull often brings on nausea and repeated vomiting, along with lethargy, an unusual heaviness, sluggishness, or difficulty staying awake. Repeated vomiting after a head injury, in particular, is a warning sign that should not be ignored.
Seizures, Collapsing, or Loss of Consciousness
These are the most severe signs and demand emergency care immediately. A seizure, a sudden collapse, or any loss of consciousness after hitting your head can mean the brain is under dangerous pressure. Even a brief blackout is a reason to call 911.
Why Some Brain Bleed Symptoms Are Delayed
Not every brain bleed shows itself right away. A slow bleed can leak gradually and take hours, days, or even weeks to build enough pressure to cause symptoms, so someone can feel fine right after a fall and decline later. This is why any major head injury should be watched closely for at least 24 to 48 hours, and longer for people at higher risk. If new or worsening symptoms appear in the hours and days after a head injury, treat it as an emergency and call 911.
A Short Review of FASTER
A brain bleed can take the form of a hemorrhagic stroke, so the FASTER method for spotting a stroke doubles as a quick field check for a bleed. It turns the symptoms above into an easy memory aid, simple enough that a preschooler can learn it, so you can act fast when it counts:
• Face: ask the person to smile and watch for drooping on one side.
• Arms: ask them to raise both arms and hold for a count of 10; watch for one drifting down.
• Stability: check their balance, as they may trip, feel very dizzy, or be unable to stand.
• Talking: ask them to repeat a simple sentence like “The apple is red” and listen for slurring.
• Eyes: ask about sudden vision changes, including double or lost vision.
• React: call 911 right away if you see any of these signs. Even if they subside, call, and note when they started.
Concussion vs. Brain Bleed: What Is the Difference?
A concussion and a brain bleed can both follow a hit to the head, but they are not the same. A concussion is a mild traumatic brain injury caused by the brain moving inside the skull; it disrupts brain function temporarily but does not involve bleeding, and most people recover with rest. A brain bleed involves actual bleeding inside the skull and is far more dangerous, requiring emergency care.
Is a Concussion a Brain Bleed?
No. A concussion does not involve bleeding; a brain bleed does. They can be hard to tell apart at first because their early symptoms overlap: headache, confusion, and dizziness show up with both. A brain bleed, though, tends to bring more severe or worsening signs, and the same impact can cause both injuries at once. The only reliable way to rule out a bleed is medical evaluation and imaging, so when in doubt after a head injury, get checked.
Common Causes and Risk Factors
Any major head trauma can cause a brain bleed, and head injury is the primary cause. The causes are as varied as the ways you can hit your head, but the risk factors that decide how likely a bleed is after an injury are easy to overlook. People at high risk may develop a bleed from a far less severe blow than someone without these factors.
Age
As the body ages, bones weaken and blood vessel walls thin, and mobility issues make falls more likely. Older adults are at the highest risk for brain bleeds, largely because slip-and-fall accidents are the single largest contributor to brain bleeds. Weakened blood vessels and reduced clotting also mean that when damage occurs, they bleed more readily.
Medications
Many medications thin the blood, so when bleeding starts, it is heavier and faster before the body can form a clot. This matters especially when bringing someone else in for a suspected brain bleed, since they may not be able to tell the doctor what they take. An inaccurate surrogate report can hurt their chances of recovery, so if you are a caretaker or emergency contact, know their medications.
High Blood Pressure
Faster-flowing blood bleeds more before it clots. The higher a person’s blood pressure, the more this risk factor matters after any head injury.
What to Do If You Hit Your Head
How you respond in the first minutes and hours after a head injury matters:
• Call 911 right away for the emergency signs above, especially any loss of consciousness, a seizure, repeated vomiting, or one-sided weakness.
• Even if symptoms are mild, have the injury evaluated, since a bleed can start slowly.
• Have someone stay with the injured person and watch for new or worsening symptoms over the next day or two.
• Rest, and avoid blood-thinning medications like aspirin unless a doctor directs otherwise.
• Do not drive yourself if a bleed is possible; call 911 so care can begin on the way to the hospital.
AICA Orthopedics for Recovery After a Head Injury
A head injury of any kind is serious, and depending on the impact and your risk factors, the chance of a brain bleed can rise sharply. A brain bleed is an emergency for a hospital, so call 911 and get to the ER first. Afterward, following your doctor’s orders gives you the fastest, fullest recovery. If you or a loved one still has complications after a traumatic brain injury, or related head, neck, and spine injuries from a fall or car accident, AICA Orthopedics can help with follow-up care. Our neurologists and physical therapists coordinate rehabilitation once you are stable, across more than 22 Metro Atlanta locations. Call (404) 855-2141 to begin your recovery.
Frequently Asked Questions
How long after hitting your head can a brain bleed start?
It varies. Some bleeds cause symptoms within minutes, while a slow bleed can take hours, days, or even weeks to build enough pressure to be noticed. Because of that delay, any major head injury is worth watching closely for at least 24 to 48 hours, and longer for older adults or people on blood thinners.
Can you have a brain bleed and not know it?
Yes. A slow bleed can cause few or no symptoms at first, and someone may feel fine right after the injury. Warning signs like a worsening headache, confusion, drowsiness, or repeated vomiting can appear later, which is why a head injury should be evaluated even when you feel okay at the time.
Is a concussion a brain bleed?
No. A concussion is a mild traumatic brain injury that temporarily disrupts brain function without bleeding, while a brain bleed involves actual bleeding inside the skull and is a medical emergency. Because their early symptoms look alike, imaging is the only way to rule out a bleed after a head injury.
What should I do if I hit my head and feel fine?
Watch closely. Have someone stay with you, avoid blood thinners and strenuous activity, and rest. Call 911 if any warning sign appears: a worsening headache, vomiting, confusion, slurred speech, weakness, or drowsiness. When symptoms are severe from the start, do not wait to see whether they pass.
