When someone has a brain bleed, the medical team works fast to stop the bleeding, reduce pressure inside the skull, and prevent further damage. The exact treatment depends on what type of bleed it is, where it’s located, and how large it is. Some brain bleeds are managed with medications and close monitoring in an intensive care unit, while others require surgery. Here’s what happens at each stage.
The First Hours: Imaging and Stabilization
A CT scan of the head is the first step. It takes minutes and can immediately show whether blood is pooling inside the skull, where the bleed is, and roughly how much blood has collected. In some cases, a follow-up CT angiogram or MRI helps pinpoint the source, such as a ruptured aneurysm or a damaged blood vessel.
Once the type and location are confirmed, the priority shifts to stabilization. Blood pressure control is one of the most critical early interventions. For most people who arrive with elevated blood pressure, the goal is to bring systolic pressure (the top number) down into the 130 to 139 range. Dropping it too aggressively below 130 can be harmful, so doctors use adjustable IV medications that allow precise, continuous control. Keeping blood pressure stable and avoiding big swings during the first hours helps limit the bleed from expanding.
Reversing Blood Thinners
If you’re on a blood thinner when the bleed happens, reversing its effect becomes urgent. The approach depends on which medication you take.
For warfarin, the standard treatment is intravenous vitamin K along with a concentrated clotting factor product that restores the blood’s ability to clot within minutes rather than hours. The dose is adjusted based on how thinned your blood is at the time.
For newer blood thinners like apixaban (Eliquis) or rivaroxaban (Xarelto), there’s a specific reversal agent called andexanet alfa that directly counteracts the drug. When that isn’t available or doesn’t meet certain criteria, doctors use the same concentrated clotting factors given for warfarin at a higher dose. How recently you took the blood thinner and how much you took determines the exact protocol.
Draining Excess Fluid
Blood inside the skull can block the normal flow of spinal fluid, causing it to build up in the brain’s internal chambers. This condition, called hydrocephalus, creates dangerous pressure. It’s one of the most common complications of brain bleeds, whether from a ruptured aneurysm, a bleed that spills into the brain’s fluid-filled spaces, or trauma.
To relieve it, doctors place a thin tube called an external ventricular drain through a small hole in the skull. The tube sits inside one of the brain’s fluid chambers and allows excess fluid and blood to drain into a collection bag outside the body. This can be done at the bedside in critical situations. The drain stays in place for days to weeks depending on how quickly the fluid pathways clear. Doctors gradually wean the drain by raising the drainage level to see if the brain can manage fluid on its own before removing it.
Surgery for Aneurysms
When a brain bleed is caused by a ruptured aneurysm (a balloon-like weak spot on a blood vessel), the aneurysm itself needs to be sealed off to prevent a second, often more dangerous rupture. There are two main approaches.
Surgical clipping involves opening a small section of the skull and placing a tiny titanium clip across the base of the aneurysm. The clip pinches off the weak spot, stopping blood from entering it while preserving normal blood flow through the surrounding vessels.
Endovascular coiling is less invasive. A catheter is threaded from a puncture site in the leg up through the blood vessels to the aneurysm. Once there, the surgeon packs the aneurysm with tiny platinum coils or places a stent to redirect blood flow away from it. Because this approach works from inside the blood vessels, there’s no skull incision.
Which method is best depends on the aneurysm’s size, shape, and location in the brain, along with the patient’s age and overall health. Both are effective, and many hospitals with specialized neurosurgery teams offer both options so they can choose the better fit for each case.
Removing the Blood Clot
When a large collection of blood forms inside the brain tissue itself (as opposed to an aneurysm bleed), the decision of whether to surgically remove that clot is one of the most important calls the medical team makes. Not every brain bleed needs surgery. Smaller bleeds in deeper parts of the brain are often managed with medication and monitoring alone. But larger bleeds, especially those in the outer portions of the brain or the front areas near the surface, may benefit from evacuation.
Traditional open surgery involves removing a section of skull to access and remove the clot directly. This is effective but carries significant risks because of the amount of brain tissue that gets disturbed along the way.
Minimally invasive techniques have become increasingly important. These use small openings, narrow tubes, or endoscopes to reach the clot with far less disruption to surrounding brain tissue. One well-studied method uses a thin tubular retractor to create a corridor to the clot, then removes it under direct visualization with a microscope or camera. Another technique, called SCUBA, uses an endoscope to aspirate blood underwater, giving surgeons a clear view of any active bleeding points.
Results from a major 2024 clinical trial (ENRICH) showed meaningful benefits for minimally invasive surgery in patients with medium-to-large bleeds (30 to 80 milliliters of blood). Patients who had surgery were more likely to have better functional outcomes at six months. Perioperative death was 9.3% in the surgery group compared to 18% in patients treated with medication alone. Rebleeding after surgery was low at 3.3%, and patients who had surgery spent less time in both the ICU and the hospital overall.
Monitoring in the ICU
Regardless of whether surgery is performed, anyone with a significant brain bleed spends time in a neurological ICU. The medical team monitors brain pressure, blood pressure, oxygen levels, and neurological function around the clock. Repeat CT scans are common in the first 24 to 48 hours to check whether the bleed has expanded.
Seizures are a real risk after a brain bleed, so patients are often monitored with continuous brain wave recordings. Fever, blood sugar spikes, and blood pressure swings can all worsen brain injury, so controlling these factors is a major focus of ICU care. For subarachnoid hemorrhages specifically, a dangerous narrowing of blood vessels called vasospasm can develop days after the initial bleed, so monitoring extends well beyond the first few days.
Recovery and Rehabilitation
The fastest improvement typically happens in the first six months. During that window, gains in movement, thinking, and communication tend to come more quickly. Progress continues beyond six months, but the pace slows. Many people continue recovering function for years.
Rehabilitation usually begins while still in the hospital, starting with basic physical and occupational therapy as soon as the person is medically stable. After discharge, many patients move to an inpatient rehabilitation facility for intensive daily therapy before transitioning to outpatient sessions.
Long-term data from research tracking people with moderate to severe brain injuries gives a realistic picture of what recovery looks like at the two-year mark. About 90% of people live at home rather than in a care facility. Roughly half are able to drive again, though some adjust how often or when they drive. About 30% return to work, though not necessarily the same job they held before. Around 30% still need some level of daily assistance from another person, and about 25% experience major depression, which is worth screening for and treating as its own condition rather than dismissing as a normal response to injury.
The severity and location of the original bleed, the person’s age, and how quickly treatment began all influence the recovery trajectory. Two people with similar-looking bleeds on a scan can have very different outcomes, which makes early, aggressive rehabilitation one of the most important factors within anyone’s control.