Hemorrhagic Stroke: Emergency Recognition and Critical Care
Updated: 2 days ago
Medically reviewed by Dr. Baraa Alnahhal, MD · Last reviewed: October 2026
Quick Answer
A hemorrhagic stroke is a stroke caused by a broken blood vessel in the brain, with two main types: intracerebral and subarachnoid [1]. Unlike an ischemic stroke, it involves active bleeding that damages brain cells through oxygen deprivation and pressure [1]. High blood pressure is the most common cause [1], and recognizing signs like a sudden thunderclap headache is essential for survival.
What the research says
Aggressive blood pressure lowering is not right for everyone. In a post hoc analysis of the ATACH-2 trial (974 patients with intracerebral hemorrhage), people with reduced kidney function (eGFR below 60) were more likely to die or be disabled at 90 days (adjusted odds ratio 2.02, 95% CI 1.25 to 3.26). Those patients also did worse on intensive blood pressure control (odds ratio 3.60, 95% CI 1.47 to 8.80), which raised safety concerns for that group (Fukuda-Doi et al., Neurology, 2021) [2].
Hitting the blood pressure target is not the same as better recovery. In a trial of 338 patients with intracerebral hemorrhage and a systolic blood pressure of 150 mmHg or higher, a protocol using remifentanil and dexmedetomidine raised the share reaching a systolic pressure below 140 mmHg at one hour from 39.8% to 62.7%. It did not improve clinical outcomes, and slow heart rate and breathing depression were more common (Dong et al., Anesthesiology, 2024) [3].
Migraine appears linked to hemorrhagic stroke. A review of the evidence reports that migraine seems to be associated with hemorrhagic stroke, and that migraine aura status has only a small influence on this link. The authors stress finding and treating vascular risk factors in people with migraine (Øie et al., Journal of Neurology, Neurosurgery & Psychiatry, 2020) [4].
Key Takeaways
Feature | Hemorrhagic Stroke Details |
Primary Definition | Brain cell damage caused by a ruptured blood vessel and bleeding in or around the brain [1]. |
Main Types | Intracerebral (inside brain tissue) and subarachnoid (the space around the brain) [1]. |
Primary Cause | High blood pressure (hypertension) [1]. |
Emergency Acronym | BE FAST: Balance, Eyes, Face, Arms, Speech, Time [1]. |
Critical Symptom | A sudden, extremely severe "thunderclap" headache [1]. |
Core Treatments | Blood pressure control, clotting support, and emergency surgery [1]. |
The Mechanics of a Brain Bleed
A hemorrhagic stroke is one of the most severe forms of cerebrovascular crisis. When a vessel ruptures, the bleeding hits the brain in two ways. First, the area downstream from the break is deprived of oxygen-rich blood, which causes rapid cell death. Second, blood pooling inside the fixed space of the skull raises intracranial pressure, which squeezes and damages healthy brain tissue [1].
Hemorrhagic strokes are particularly dangerous because their symptoms are severe and get worse quickly, and they are more likely to be fatal than ischemic strokes [1]. Doctors distinguish intracerebral hemorrhages, in which a vessel inside the brain ruptures, from subarachnoid hemorrhages, in which bleeding fills the space between the brain and the protective arachnoid membrane [1]. Both types can be deadly without fast treatment to stop the bleeding and relieve pressure.
Recognizing the Warning Signs: BE FAST
Every second counts during a stroke, so doctors teach the BE FAST acronym to help anyone recognize an emergency:
Balance: A sudden loss of balance.
Eyes: Sudden vision loss or vision changes in one or both eyes.
Face: A droop on one or both sides of the face when smiling.
Arms: One arm that does not move, sags, or is very weak when both are raised.
Speech: Slurred speech or trouble finding the right words.
Time: Call for help immediately, and note when symptoms started because it helps the care team choose treatments.
A hemorrhagic stroke often causes a "thunderclap" headache [1], a sudden, agonizing pain that survivors describe as the worst headache of their lives. Other symptoms can include:
A transient ischemic attack (TIA), or "mini-stroke," causes temporary stroke-like symptoms. It is often a warning that a true stroke may follow soon [1], so it also needs emergency care.
Causes, Risks, and Prevention
Anything that damages or breaks blood vessels in the brain can cause a hemorrhagic stroke. High blood pressure is the most common cause [1], especially when it is very high or stays high for a long time [1]. Other causes include brain aneurysms (weak spots in vessel walls), brain tumors, Moyamoya disease, cerebral amyloid angiopathy, head injuries, COVID-19, and ischemic strokes that bleed during or after the stroke [1].
Anyone can have a hemorrhagic stroke, but the risk is higher if you:
Keeping your blood pressure in a healthy range is the most important way to prevent a hemorrhagic stroke [1]. Managing other health conditions, eating healthy foods and keeping a healthy weight, staying physically active, quitting smoking, and having regular checkups also help [1].
Diagnosis
A healthcare provider diagnoses a hemorrhagic stroke with a neurological exam and tests such as a CT scan, an MRI, blood tests, and an electrocardiogram (EKG) [1]. A CT scan or MRI quickly shows where the bleeding is and how much there is.
Emergency Management and Rehabilitation
Treatment focuses on two immediate priorities: stopping the bleeding and reducing pressure on the brain [1]. The two main treatments are medicines and surgery [1].
Medicines work in one of two ways:
Clotting support: For people taking blood thinners such as warfarin, medicines such as vitamin K or prothrombin complex concentrate reverse the blood thinner to help stop the bleeding in the brain [1].
Blood pressure management: An intravenous (IV) blood pressure medicine keeps pressure in a safe range [1], which can slow the bleed and help the blood clot and seal the damaged vessel.
If blood builds up and intracranial pressure rises, emergency surgery may be needed to remove the extra blood and relieve the pressure on the brain [1].
After the person is stable, rehabilitation is an important part of recovery. It often includes:
Speech therapy: To regain or improve language and speaking, and to help with the muscles used for talking, breathing, eating, and swallowing [1].
Physical therapy: To strengthen muscles, improve balance, and regain use of the arms and legs [1].
Occupational therapy: To help safely complete daily tasks, especially those that need precise movements [1].
Cognitive therapy: To help improve memory, concentration [1], and other mental abilities.
Depression and anxiety are very common after a stroke [1]. Talk to your provider or a mental health professional if you need help during recovery.
Conclusion
A hemorrhagic stroke is a devastating event, but fast recognition and emergency care can greatly improve the chances of survival and recovery. By managing risk factors such as high blood pressure and knowing the BE FAST warning signs, you can take proactive steps to protect your brain health.
Frequently Asked Questions
What is the difference between an ischemic and a hemorrhagic stroke?
An ischemic stroke is caused by a blockage (a clot), while a hemorrhagic stroke is caused by a bleed (a rupture).
Why is a hemorrhagic stroke considered more dangerous?
It damages the brain through both oxygen deprivation and increased pressure inside the skull, and symptoms often get worse quickly. Hemorrhagic strokes are more likely to be fatal than ischemic strokes [1].
What does a "thunderclap" headache feel like?
A sudden, extremely severe headache that reaches full intensity within seconds or minutes.
Can high blood pressure cause a stroke?
Yes. High blood pressure is the most common cause of hemorrhagic stroke [1] because it weakens blood vessel walls.
What is an intracerebral hemorrhage?
A type of stroke in which bleeding occurs inside the brain tissue [1].
What is a subarachnoid hemorrhage?
Bleeding in the space between the brain and its thin, protective outer covering [1].
What does the "BE FAST" acronym stand for?
Balance, Eyes, Face, Arms, Speech, and Time [1].
Can a mini-stroke (TIA) lead to a hemorrhagic stroke?
A TIA is a temporary, stroke-like episode and a warning that a true stroke may follow soon [1]. It needs emergency care.
Are brain aneurysms always fatal?
No, but if one ruptures and causes a hemorrhagic stroke, it is a life-threatening emergency.
How is a brain bleed diagnosed in the ER?
Doctors use a neurological exam and tests, mainly a CT scan or MRI, to find the location and extent of the bleeding. Blood tests and an EKG are also used [1].
Can surgery fix a hemorrhagic stroke?
Surgery is often used to remove pooled blood and relieve pressure, though it may not reverse all brain damage.
What is vitamin K used for in stroke treatment?
It is given to people who bleed while taking warfarin, to reverse the blood thinner and help stop the bleeding [1].
Can smoking increase my stroke risk?
Yes. Smoking and other tobacco use raise the risk of a hemorrhagic stroke [1].
What is Moyamoya disease?
A rare condition in which the arteries at the base of the brain narrow, which can raise the risk of both clots and bleeds.
Can a head injury cause a hemorrhagic stroke?
Yes. Severe head trauma can rupture blood vessels and lead to a brain bleed.
What is cerebral amyloid angiopathy?
A condition in which protein builds up in the walls of brain arteries, making them fragile and prone to bleeding.
Is a hemorrhagic stroke survivable?
Yes, but survival depends heavily on how quickly the person gets medical treatment.
What are the long-term effects of a brain bleed?
Effects can include paralysis, speech difficulties, memory loss, and emotional changes such as depression or anxiety.
How long does stroke rehabilitation take?
There is no single timeline. Rehab can last weeks, months, or even years, depending on the severity of the brain damage.
Can alcohol use disorder lead to a stroke?
Yes. Alcohol use disorder is a known risk factor for hemorrhagic stroke [1].
What is an AVM (arteriovenous malformation)?
An abnormal tangle of blood vessels that can rupture and cause bleeding in the brain.
Does diabetes increase stroke risk?
Yes. Diabetes damages blood vessels throughout the body, including in the brain.
What is intracranial pressure (ICP)?
The pressure inside the skull, which rises when blood pools during a hemorrhagic stroke.
Can migraines with aura be a risk factor?
What is aphasia?
A condition that affects the ability to communicate, which can occur after a stroke.
What is dysarthria?
Slurred or garbled speech caused by weakness of the speech muscles after a neurological event such as a stroke.
Can blood thinners cause a hemorrhagic stroke?
They can. Blood thinners raise the risk of bleeding in the brain and can make a bleed larger and more severe.
What is a hematoma?
In the context of a stroke, a localized collection of blood that has pooled outside a vessel.
Can a stroke cause seizures?
Yes. Irritation of brain tissue by blood can trigger seizures.
What is photophobia?
Extreme sensitivity to light, which can be a symptom of a hemorrhagic stroke [1].
Is age a factor in hemorrhagic stroke?
Yes. The risk is higher for people older than 65 [1].
Can COVID-19 cause brain bleeds?
COVID-19 is among the conditions linked to hemorrhagic stroke [1].
What is a "prothrombin complex concentrate"?
A medicine that helps the blood clot, used to reverse the effects of certain blood thinners and to help stop bleeding in the brain.
Can physical therapy help after a stroke?
Yes. It is essential for relearning motor skills and improving balance and strength.
What is occupational therapy?
Therapy that helps stroke survivors relearn daily tasks such as dressing, eating, and bathing.
Can a stroke cause a coma?
Yes, if the bleeding is severe enough to affect the brain's centers of consciousness or cause extreme pressure.
Is neck stiffness a sign of a stroke?
It can be, especially with subarachnoid hemorrhage, when blood irritates the lining of the brain.
How can I prevent a hemorrhagic stroke?
Keep your blood pressure in a healthy range, quit smoking, stay active, eat a healthy diet, and see your provider for regular checkups [1].
Can high cholesterol cause a brain bleed?
High cholesterol contributes to vascular disease and raises the overall risk of stroke.
What is a "neurological exam"?
A series of tests a doctor uses to check your reflexes, coordination, and mental status.
Can a stroke cause vision loss?
Yes, if the stroke affects the parts of the brain that process vision.
What should I do if someone is having a stroke?
Call 911 or your local emergency number right away. Note the time the symptoms started and stay with the person until help arrives.
Is vertigo a symptom of a stroke?
Yes. Sudden, severe dizziness or a spinning sensation can be a warning sign.
Can a stroke cause paralysis?
Yes. It often causes weakness or paralysis on one side of the body.
What is a "rupture"?
The breaking or bursting of a structure, such as a blood vessel.
Can a stroke cause nausea?
Yes. Nausea and vomiting are common symptoms of a hemorrhagic stroke [1].
What is the "arachnoid membrane"?
One of the protective layers that surround the brain and spinal cord.
Can recreational drugs cause a stroke?
Yes. Recreational drugs raise the risk, and some, such as cocaine, can cause sharp spikes in blood pressure that may lead to a rupture.
Why is time so critical in stroke treatment?
The longer the brain is deprived of oxygen or under pressure, the more cells die, which leads to worse outcomes.
Can I recover fully from a hemorrhagic stroke?
Some people make a full recovery, but many survivors face long-term challenges that need ongoing therapy.
Related Reading
NIH Stroke Scale (NIHSS): What It Checks and What Your Score Means explains the quick bedside scale used to rate how severe a stroke is.
References
Cleveland Clinic. Hemorrhagic Stroke: What It Is, Symptoms & Treatment. Cleveland Clinic. Last updated October 7, 2024. https://my.clevelandclinic.org/health/diseases/23969-hemorrhagic-stroke
Fukuda-Doi M, Yamamoto H, Koga M, et al. Impact of renal impairment on intensive blood-pressure-lowering therapy and outcomes in intracerebral hemorrhage: results from ATACH-2. Neurology. 2021;97(9):e913-e921. PMID 34210824. https://doi.org/10.1212/WNL.0000000000012442
Dong R, Li F, Li B, et al. Effects of an early intensive blood pressure-lowering strategy using remifentanil and dexmedetomidine in patients with spontaneous intracerebral hemorrhage: a multicenter, prospective, superiority, randomized controlled trial. Anesthesiology. 2024;141(1):100-115. PMID 38537025. https://doi.org/10.1097/ALN.0000000000004986
Øie LR, Kurth T, Gulati S, et al. Migraine and risk of stroke. Journal of Neurology, Neurosurgery & Psychiatry. 2020;91(6):593-604. PMID 32217787. https://doi.org/10.1136/jnnp-2018-318254
Disclaimer
The information provided in this article is for educational purposes only and should not be considered medical advice. If you suspect a stroke, call emergency services immediately.
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