A broken blood vessel in the eye looks alarming. The white of your eye suddenly turns bright red, and you might wonder if it signals a serious health problem. In most cases, it does not. This condition is called a subconjunctival hemorrhage, and it happens when a tiny blood vessel breaks just beneath the clear surface of the eye. The blood has nowhere to go, so it pools between the white part of the eye and the clear covering. The root causes range from minor physical strain to underlying medical conditions that affect blood vessel health.
What Causes Leaking Blood Vessels In The Eye?
A leaking blood vessel in the eye is almost always a broken capillary, not a disease of the eye itself. The conjunctiva is the thin, transparent membrane that covers the white part of your eyeball. It contains many small, fragile blood vessels. When one of these vessels ruptures, blood leaks into the space between the conjunctiva and the sclera, which is the white part of the eye. The blood spreads out and creates a flat, red patch. This is not the same as bleeding inside the eye, which affects vision and requires urgent medical attention.
The most common triggers are everyday actions that briefly raise pressure in the veins of the head and neck. Forceful coughing, sneezing, vomiting, or straining during a bowel movement can all cause a vessel to pop. Heavy lifting with a closed airway, known as the Valsalva maneuver, has the same effect. Even vigorous eye rubbing can break a vessel. These events are harmless in isolation, and the blood typically clears on its own within one to two weeks.
Can High Blood Pressure Cause Eye Bleeding?
Yes, but it is important to distinguish between types of bleeding. A subconjunctival hemorrhage is rarely the first sign of high blood pressure. However, people with chronically elevated blood pressure have stiffer, more fragile blood vessels throughout the body, including in the eyes. This makes them somewhat more prone to vessel breaks from minor strain. The bigger concern is hypertensive retinopathy, a condition where high blood pressure damages the small blood vessels inside the retina, the light-sensitive tissue at the back of the eye. This type of damage can cause vision loss and is detected during a dilated eye exam.
If you experience repeated subconjunctival hemorrhages, checking your blood pressure is a reasonable step. A single episode in an otherwise healthy person does not require a workup. But if the bleeding happens frequently, or if you have other symptoms like headaches or blurred vision, a medical evaluation is warranted. An eye doctor can look at the retina directly and see whether blood vessels there show signs of damage from high blood pressure.
What Medications Increase the Risk of Eye Bleeding?
Blood thinners are the most common medication-related cause. Aspirin, clopidogrel, warfarin, and newer anticoagulants like apixaban and rivaroxaban all reduce the blood’s ability to clot. When a vessel breaks for any reason, blood thinners allow more bleeding to occur and make it take longer to stop. The result is often a larger, more dramatic red patch on the eye. This is not dangerous by itself, but it can be a sign that your blood is thinner than intended.
Other medications can contribute through different mechanisms. Some blood pressure drugs, particularly those that dilate blood vessels, may make vessels more prone to leaking. Steroids, including eye drops, can weaken vessel walls with prolonged use. Certain herbal supplements, such as ginkgo biloba, fish oil, and vitamin E in high doses, have mild blood-thinning effects. If you take any of these and notice frequent eye bleeding, discuss it with your doctor. Never stop a prescribed blood thinner on your own to prevent eye bleeding. The risk of stroke or blood clot from stopping these medications far outweighs the cosmetic concern of a red eye.
Are There Underlying Medical Conditions That Cause Eye Vessel Leaks?
Several systemic conditions can make blood vessels leak more easily. Diabetes is one of the most significant. High blood sugar damages the walls of small blood vessels throughout the body, including those in the eye. In the retina, this can lead to diabetic retinopathy, where vessels leak fluid and blood into the retinal tissue. This is a leading cause of blindness in working-age adults and requires regular monitoring by an eye care professional.
Other conditions that affect blood vessel integrity include bleeding disorders like hemophilia or von Willebrand disease, though these are rare. Liver disease can reduce the production of clotting factors, making bleeding more likely. Certain autoimmune conditions, such as lupus, can cause inflammation in blood vessels. A condition called Valsalva retinopathy occurs specifically from sudden pressure spikes, and it causes bleeding inside the retina rather than on the surface. If you have diabetes, high blood pressure, or a known bleeding disorder, any new eye bleeding should be checked promptly. The location of the bleeding matters. Surface bleeding that does not affect vision is usually benign. Bleeding inside the eye that causes floaters, flashes, or vision loss is an emergency.
What Does a Leaking Eye Blood Vessel Look Like?
A subconjunctival hemorrhage appears as a bright red, flat patch on the white of the eye. It may be small, like a dot, or it may spread to cover most of the visible white area. The blood is trapped under the clear conjunctiva, so it does not move or drain. It will not wash away with eye drops. The eye itself usually feels normal. There is typically no pain, no discharge, and no change in vision. You may notice a slight scratchy sensation, but most people do not feel anything at all.
The appearance can be alarming because the eye looks severely injured. The color changes over time as the blood breaks down. It may turn from bright red to orange, then yellow, and finally clear. This is the same process as a bruise on your skin, just visible on the eye. The entire process takes about one to two weeks. The blood is absorbed by the body and does not need to be drained. There is no treatment that speeds up this process meaningfully.
When Should You See a Doctor for Eye Bleeding?
Most subconjunctival hemorrhages do not require medical attention. However, you should see a doctor if the bleeding follows a direct injury to the eye, especially if there is pain or vision changes. A blow to the eye can cause more serious internal damage that is not visible on the surface. You should also seek care if you have bleeding in both eyes at the same time, if the bleeding does not begin to improve within two weeks, or if you have recurrent episodes without an obvious cause.
Seek emergency care immediately if you experience any of the following with eye bleeding: vision loss, blurred vision, floaters, flashes of light, severe pain, or the sensation that something is stuck in your eye. These symptoms suggest the bleeding is inside the eye, not on the surface. Bleeding inside the eye, known as a vitreous hemorrhage, is a different condition with more serious implications. It is often caused by diabetes, retinal tears, or trauma and requires urgent evaluation.
Can You Prevent Leaking Blood Vessels in the Eye?
Prevention focuses on avoiding the triggers that cause pressure spikes and protecting the health of your blood vessels. If you have chronic cough or constipation, treating those underlying conditions reduces the frequency of strain. When lifting heavy objects, breathe out steadily rather than holding your breath. This prevents the pressure buildup that causes vessels to break. Wear protective eyewear during sports, yard work, or any activity where the eye could be struck.
Managing systemic health conditions is the most effective long-term prevention. Keeping blood pressure within a healthy range through diet, exercise, and medication if prescribed reduces vessel fragility. Good blood sugar control in diabetes protects the small vessels in the eyes. A diet rich in vitamin C and bioflavonoids, found in citrus fruits and berries, supports collagen production that maintains vessel wall strength. But no supplement has been proven to prevent eye bleeding. The evidence for specific nutrients is limited, and a balanced diet is the most reliable approach.
Frequently Asked Questions
Can stress cause a blood vessel to burst in the eye?
Stress itself does not directly burst a vessel, but stress-related behaviors like heavy lifting, straining, or forceful coughing can trigger one. Extreme physical exertion associated with stress can also raise blood pressure briefly and contribute to a break.
How long does a broken blood vessel in the eye take to heal?
Most subconjunctival hemorrhages clear completely within one to two weeks. The red patch gradually fades to yellow before resolving, similar to how a bruise heals.
Should I stop taking blood thinners if my eye is bleeding?
No, never stop a prescribed blood thinner without consulting your doctor. A surface eye bleed is not dangerous, and stopping the medication puts you at risk for stroke or blood clots.
Is a leaking blood vessel in the eye a sign of a stroke?
A subconjunctival hemorrhage is not a sign of an impending stroke. However, if you have vision changes, weakness, or difficulty speaking along with eye bleeding, seek emergency care immediately.
