Burst Blood Vessel in the Eye
What Is a Burst Blood Vessel in the Eye?
A subconjunctival hemorrhage is the medical term for a burst blood vessel in your eye. The conjunctiva is a thin, clear membrane that covers the white part of your eye, and it contains many tiny blood vessels. When one of these small vessels breaks, blood spreads between the conjunctiva and the white surface underneath, creating a visible red patch.
In uncomplicated cases, the bleeding does not affect the inside of your eye or the parts responsible for your vision. The blood stays trapped in a very thin space on the surface, which is why it looks so bright and dramatic.
The blood vessels in your conjunctiva are extremely delicate and can break easily. Even minor increases in pressure can cause them to rupture, releasing a small amount of blood. Because the conjunctiva is clear, the blood becomes very visible against the white background of your eye.
- The conjunctival blood vessels have very thin walls
- Sudden pressure changes can exceed the strength of these walls
- Once broken, blood spreads quickly under the transparent membrane
- Your body reabsorbs the blood naturally over time
A true subconjunctival hemorrhage creates a solid, bright red patch with sharp borders. Other red eye conditions look different and have different causes. Pink eye or conjunctivitis causes overall pinkness with discharge, while eye irritation from allergies or dryness creates a network of visible red blood vessels across the white of your eye.
We can identify a burst blood vessel by its distinct appearance. There is no blood inside the front of the eye, the cornea remains clear, and vision is typically unaffected. You typically will not see discharge or crusty buildup on your eyelashes.
Some red eye conditions require urgent care and look different from a simple burst blood vessel. Warning features include:
- Severe pain, photophobia, or light sensitivity that suggests inflammation inside the eye (uveitis or iritis) or a corneal problem (keratitis or abrasion)
- Blurred or decreased vision, halos around lights, or corneal haze
- Contact lens use combined with pain or discharge, which may signal a corneal infection
- Deep, boring eye pain that may indicate scleritis or other inflammatory disease
Signs You Have a Burst Blood Vessel in Your Eye
The most obvious sign is a vivid red area that appears suddenly on the white surface of your eye. The patch may be small, about the size of a dot, or it can cover a large section. The edges are usually well-defined, and the color is a bright, blood red rather than pink.
Many patients notice the redness when looking in a mirror or when someone else points it out to them. The appearance can be startling, but the dramatic look does not match the seriousness of the condition in most cases.
Most people with a burst blood vessel feel no pain at all. You might experience a slight scratchy sensation or mild awareness that something is different, but significant pain is rare. The break in the blood vessel happens on the surface and does not involve pain-sensitive structures inside your eye.
- The blood is under the conjunctiva and usually does not involve the cornea or internal eye structures that cause significant pain or photophobia
- No inflammation or infection is typically present
- Some people report a vague feeling of fullness
- Artificial tears can relieve any minor scratchiness
However, pain, photophobia, or a strong gritty foreign-body sensation should prompt evaluation for corneal abrasion, keratitis, uveitis, or other causes beyond a simple subconjunctival hemorrhage.
Sometimes a burst blood vessel starts small but appears to grow over the first day or two. This happens because blood continues to spread under the conjunctiva before it clots and stops. The expansion is normal and does not mean a new vessel has broken or that the problem is getting worse.
The blood may shift slightly as you change positions, and gravity can move it within the space under the conjunctiva. This movement is not a cause for concern as long as you do not have other symptoms.
While most burst blood vessels are harmless, certain symptoms mean you should seek care right away. We want to see you immediately if you experience vision changes, significant eye pain, or blood in the colored part of your eye or pupil. These signs could indicate a more serious injury or condition.
- Sudden decrease in vision or blurry vision that does not clear
- Severe pain or throbbing in or around your eye
- Blood visible inside the colored part of your eye
- Burst blood vessels in both eyes at the same time
- History of recent eye trauma or head injury
- Redness after a significant impact, fall, or suspected penetrating injury
- A pupil that looks irregular, new double vision, or the eye looks misshapen
- Marked swelling or bruising around the eye or inability to open the eyelids
- A ring or 360-degree red area around the white of the eye after trauma
- New light sensitivity (photophobia) or a strong foreign-body sensation
Even if pain is mild, any subconjunctival hemorrhage that follows trauma may need urgent evaluation to rule out deeper injury.
Common Causes and Risk Factors
Activities that increase pressure in your head and eyes can rupture the tiny vessels in your conjunctiva. Straining during a bowel movement, lifting something heavy, or having a sudden coughing or sneezing fit can all create enough pressure to break a vessel. Vomiting forcefully can also cause this problem.
These pressure spikes are often brief and harmless in themselves, but they can be strong enough to damage delicate eye blood vessels. Many patients cannot recall a specific moment when the vessel broke because the pressure change happened so quickly.
Medications that prevent blood clots make bleeding more likely throughout your body, including in your eyes. If you take aspirin, warfarin, or newer blood thinners, you have a higher risk of developing a subconjunctival hemorrhage even from minor trauma or pressure changes.
- Blood thinners prevent normal clotting after a vessel breaks
- Even over-the-counter aspirin can increase your risk
- Blood clotting disorders produce similar effects
- Frequent burst blood vessels may prompt testing for clotting problems
Chronic high blood pressure weakens blood vessels throughout your body, including the small vessels in your eyes. When your blood pressure is poorly controlled, the vessel walls become more fragile and can break more easily. Diabetes also affects blood vessel health and healing.
We may check your blood pressure during your visit if you have a burst blood vessel, especially if this is not your first episode. Managing these underlying conditions can reduce your risk of future bleeds.
Direct injury to your eye or the area around it can break blood vessels. Even rubbing your eyes vigorously when they itch can cause enough trauma to rupture a vessel. Trauma from sports, accidents, or foreign objects in the eye can also lead to bleeding under the conjunctiva.
If your burst blood vessel followed any kind of injury, we need to examine your eye carefully. Trauma can sometimes cause additional damage that needs treatment, even if the burst vessel itself is minor.
In many cases, we cannot identify a specific trigger for a burst blood vessel. You may wake up with the red patch or notice it during your normal day without any preceding event. This is common and usually not a concern if it happens once or only occasionally.
- Minor pressure changes during sleep may go unnoticed
- Some people have naturally more fragile conjunctival vessels
- A single episode without a clear cause rarely needs extensive testing
- Repeated episodes warrant investigation for underlying conditions
How We Diagnose a Burst Blood Vessel
During your examination, our eye doctor will look at your eye with a bright light and magnification to see the extent of the bleeding. We check that the blood is only under the conjunctiva and not inside your eye. We also examine the rest of your eye to make sure no other problems are present.
The exam is quick and painless. We may gently lift your eyelid to see the full area of bleeding and check for any signs of injury or infection. In most cases, the diagnosis is straightforward based on the appearance of your eye.
We will ask about your medical history, including any medications you take, especially blood thinners. Checking your blood pressure is an important part of the visit because high blood pressure is a common and treatable risk factor. We also want to know if you have had previous episodes or any recent trauma or illness.
- Current medications, including supplements and over-the-counter drugs
- History of bleeding disorders or easy bruising
- Recent coughing, vomiting, or straining
- Previous eye problems or surgeries
- Chronic conditions like diabetes or hypertension
- Easy bruising or bleeding elsewhere, such as nosebleeds or bleeding gums
- Recent changes in anticoagulant medication or dosage
- Recent infections or prolonged coughing bouts
Most burst blood vessels do not require any testing beyond the eye exam. However, if you have recurring episodes, very large bleeds, or other concerning symptoms, we may recommend blood tests to check your clotting function and overall health. Imaging is rarely needed unless we suspect trauma has caused deeper eye damage.
We may refer you to your primary care doctor if we find high blood pressure or suspect a bleeding disorder. For patients taking warfarin or other anticoagulants, coordination with the prescribing clinician may be appropriate when episodes are recurrent, large, or accompanied by other bleeding signs. Treating the underlying cause is important for preventing future problems.
Treatment Options and Healing Timeline
Your body naturally reabsorbs the blood from a subconjunctival hemorrhage over time, just as it heals a bruise on your skin. No medication can speed up this process, and the blood does not need to be removed. The healing happens on its own as your body breaks down and clears away the trapped blood cells.
We typically do not prescribe any specific treatment for an uncomplicated burst blood vessel. Attempting to treat it with drops or other interventions usually does not help and is not necessary.
If your eye feels scratchy or irritated, we may recommend lubricating eye drops, also called artificial tears. These over-the-counter drops can soothe any mild discomfort without interfering with healing. Use preservative-free artificial tears if you need to apply them more than four times per day.
- Artificial tears provide moisture and comfort
- They do not speed healing but can relieve scratchiness
- Preservative-free formulas are gentler for frequent use
- Avoid drops that claim to reduce redness, as they can cause rebound irritation
A burst blood vessel typically takes about two weeks to heal completely, though smaller ones may clear in a week and larger ones may take up to three weeks. The bright red color will gradually change to lighter shades, including orange, yellow, and sometimes brownish as the blood breaks down. This color change is a normal part of healing.
The edges of the red area may fade first, with the center clearing last. You might notice the appearance changes day by day. As long as the overall trend is toward clearing and you have no new symptoms, the healing is progressing normally.
If you experience multiple burst blood vessels over a short period, or if they keep coming back over months, we need to investigate further. Recurrent bleeds can signal an underlying problem such as uncontrolled high blood pressure, a clotting disorder, or an issue with your blood-thinning medication.
Our eye doctor will work with you and possibly your primary care physician to identify and manage any contributing factors. Treating the root cause can help prevent future episodes and protect your overall health.
Preventing Future Burst Blood Vessels
Controlling chronic conditions like high blood pressure and diabetes is one of the most effective ways to reduce your risk of future burst blood vessels. Regular checkups with your primary care doctor, taking medications as prescribed, and following lifestyle recommendations all help keep your blood vessels healthy.
- Monitor and control your blood pressure through medication and lifestyle changes
- Manage blood sugar levels if you have diabetes
- Attend regular medical appointments to track your health
- Follow your doctor's advice about diet, exercise, and stress management
Wearing protective eyewear during activities that could injure your eyes helps prevent trauma-related bleeding. Safety glasses or goggles are important when playing sports, doing yard work, or working with tools. Avoid rubbing your eyes forcefully, even when they itch.
If you have allergies that make your eyes itchy, treating the allergies with appropriate medications can reduce the urge to rub. Gentle patting with a clean tissue is safer than rubbing when your eyes feel irritated.
If you take blood-thinning medications and experience frequent burst blood vessels, talk to the doctor who prescribed the blood thinner. Do not stop taking these medications on your own, as they are often essential for preventing serious conditions like strokes or blood clots. Your doctor may be able to adjust the dose or try a different medication.
Always inform our eye doctor and all your healthcare providers about every medication and supplement you take. Some over-the-counter products and herbal supplements can affect bleeding risk without you realizing it.
Being mindful of activities that cause sudden pressure increases can help protect your eye blood vessels. If you need to lift something heavy, breathe steadily rather than holding your breath. Treating constipation promptly can reduce straining during bowel movements, and managing conditions that cause chronic coughing can also help.
- Use proper lifting techniques and avoid holding your breath
- Stay hydrated and eat enough fiber to prevent constipation
- Seek treatment for chronic cough or respiratory conditions
- Take breaks during activities that involve intense physical effort
Frequently Asked Questions
A simple, uncomplicated subconjunctival hemorrhage does not damage your vision or cause permanent harm to your eye. The blood stays on the surface and does not reach the parts of your eye responsible for sight. Your vision should remain clear throughout the healing process, and the blood vessel will repair itself as the blood clears.
However, if you experience any vision changes, that suggests a different or additional problem requiring urgent assessment.
There is no medical reason to cover your eye or wear a patch when you have a burst blood vessel. Covering your eye does not speed healing and can actually make your eye less comfortable.
We recommend keeping your eye uncovered for comfort and hygiene.
You can usually continue wearing contact lenses if your eye feels comfortable and our eye doctor has confirmed you have only a simple burst blood vessel. However, if your eye feels scratchy or irritated, switching to glasses temporarily may be more comfortable.
Stop wearing your lenses and seek care immediately if you experience pain, light sensitivity, discharge, reduced vision, or if the hemorrhage followed contact lens insertion or removal trauma. Make sure to follow proper lens hygiene and discontinue lens wear if any discomfort develops.
The red patch may appear to grow or spread during the first day or two because blood continues to move under the conjunctiva before it fully clots. This expansion is expected and does not mean your condition is worsening.
After the initial spreading stops, the blood will gradually fade through color changes until it disappears completely.
Stress and poor sleep do not directly break blood vessels, but they can contribute indirectly by raising your blood pressure or making you more likely to rub your eyes. Chronic stress may affect your overall vascular health over time.
Managing stress and getting adequate rest supports your general health, which includes the health of your eye blood vessels.
Getting Help for Burst Blood Vessel in the Eye
If you notice a bright red patch on your eye and are concerned, we encourage you to schedule an examination for peace of mind. Our eye doctor can confirm the diagnosis, check for any underlying problems, and provide guidance on what to expect during healing. Seek immediate care if you experience vision changes, severe pain, or if the bleeding followed an eye injury.