A broken blood vessel in the eye looks alarming. The white of your eye turns bright red, often overnight or after a sneeze. It looks like a serious injury, but in most cases it is harmless.
The medical name is subconjunctival hemorrhage. It happens when a tiny blood vessel breaks just beneath the clear surface of the eye. The blood spreads out and gets trapped, turning the white part red. It is usually painless, does not affect vision, and clears up on its own within one to two weeks.
Why Does A Blood Vessel Burst In The Eye? Why It Happens
A blood vessel bursts in the eye when pressure or strain damages a fragile capillary. The blood vessels on the surface of the eye are very thin. They sit in a loose layer of tissue, so when one breaks, the blood spreads easily and pools under the clear membrane.
Common triggers include coughing hard, sneezing, vomiting, lifting something heavy, or straining during a bowel movement. Even rubbing your eye too hard can do it. A minor injury, like getting poked in the eye, can also cause it.
In many cases, there is no clear cause at all. People wake up, look in the mirror, and find a red patch with no memory of anything that could have caused it. That is normal and not a reason for concern by itself.
What Does A Broken Blood Vessel In The Eye Look Like?
The appearance is distinctive. A bright red, flat patch covers part or all of the white of the eye. It looks like a splash of ketchup or a red stain. The blood stays within the white area and does not cross into the colored part of the eye.
There is no pain in a typical subconjunctival hemorrhage. You may feel a slight scratchy sensation, like something is in your eye, but most people feel nothing at all. Vision remains normal. You will not experience blurring, double vision, or loss of sight.
The redness may spread slightly over the first 24 to 48 hours. This looks concerning, but it is just the blood settling under the tissue. Over the following days, the color changes from bright red to yellow or brown as the body reabsorbs the blood. This is a normal healing process.
When Should You See A Doctor?
Most broken blood vessels in the eye do not need medical attention. However, some situations do require a professional evaluation.
See a doctor if you have pain in the eye, changes in vision, or if the blood does not clear within two weeks. Also seek care if you have had a direct injury to the eye, especially if the injury was forceful or involved a sharp object.
Recurrent subconjunctival hemorrhages deserve attention. If you get them frequently without a clear cause, a doctor should check your blood pressure. High blood pressure can make these vessels more likely to break.
People taking blood thinners, such as warfarin or apixaban, should mention any eye bleeding to their doctor. The same applies to anyone with a bleeding disorder. These situations are not emergencies, but they warrant a conversation about whether the medication or condition is playing a role.
One warning sign is important to know. If the blood appears as a small pool at the front of the eye, just behind the colored part, this is called a hyphema. That is different from a subconjunctival hemorrhage and requires immediate medical attention.
What Increases Your Risk?
Several factors make a broken blood vessel in the eye more likely. High blood pressure is the most significant medical risk factor. Chronically elevated pressure puts stress on all blood vessels, including the delicate ones in the eye.
Blood-thinning medications raise the risk. Aspirin, clopidogrel, warfarin, and the newer direct oral anticoagulants all make bleeding more likely. This includes minor bleeding like subconjunctival hemorrhage.
Eye strain from contact lenses can contribute. Lenses that do not fit well or are worn too long can irritate the surface of the eye and make vessels more fragile. Dry eyes have a similar effect.
Everyday physical strain is the most common trigger. Weightlifting, straining during constipation, and even vigorous coughing can cause a vessel to pop. These activities briefly raise pressure in the veins of the head and neck, and that pressure transmits to the eye.
How Is A Broken Blood Vessel In The Eye Treated?
There is no treatment that speeds up healing. The body reabsorbs the blood on its own, usually within one to two weeks. The process cannot be accelerated.
Artificial tears can help if the eye feels scratchy or dry. These over-the-counter drops provide lubrication and comfort. They do not treat the hemorrhage itself.
Do not use eye drops marketed for “redness relief.” These contain vasoconstrictors that shrink blood vessels. They will not clear the trapped blood and may cause rebound redness when they wear off. They are not appropriate for this condition.
Avoid rubbing the eye. Rubbing can irritate the area and potentially cause additional bleeding. Leave the eye alone and let it heal naturally.
Warm compresses are sometimes mentioned as a home remedy. There is no strong evidence that they speed healing, though they are unlikely to cause harm if applied gently to the closed eyelid. The main benefit is comfort, not recovery time.
Can You Prevent A Broken Blood Vessel In The Eye?
You cannot fully prevent subconjunctival hemorrhages. The vessels are fragile, and everyday activities like coughing or sneezing can trigger a break. There is no way to make these vessels stronger.
What you can do is manage the underlying risk factors. Keep blood pressure under control. If you have hypertension, take your medication as prescribed and monitor your readings regularly. Some research suggests that people with high blood pressure have a higher rate of subconjunctival hemorrhage.
If you take blood thinners, do not stop them on your own. Talk to your doctor about any concerns. The decision to adjust medication involves balancing the risk of bleeding against the risk of blood clots, and that decision belongs to your physician.
Wear eye protection during activities that could injure the eye. Sports, yard work, and home repairs all carry a risk of eye trauma. Protective eyewear reduces the chance of injury-related hemorrhage.
For contact lens wearers, follow proper hygiene and replacement schedules. Ill-fitting or overused lenses irritate the eye surface and can make blood vessels more prone to breaking.
What Else Could It Be?
Most red eyes are not broken blood vessels. Conjunctivitis, or pink eye, causes redness but also brings itching, discharge, and crusting. Allergies cause redness with itching and tearing. These conditions affect both eyes more often than a hemorrhage does.
A subconjunctival hemorrhage is usually one-sided and painless. If you have redness with pain, light sensitivity, or blurry vision, the cause may be something more serious, such as inflammation inside the eye or elevated eye pressure. These conditions require prompt evaluation.
If the red area does not get better or keeps coming back in the same spot, a doctor should look at it. Rarely, a growth or abnormal blood vessel can cause recurrent bleeding. These are uncommon, but they are worth ruling out if the pattern repeats.
Frequently Asked Questions
How long does a broken blood vessel in the eye take to heal?
Most subconjunctival hemorrhages clear up within one to two weeks. The redness fades gradually, changing from bright red to yellow before disappearing completely.
Can stress cause a blood vessel to burst in the eye?
Stress itself does not directly burst a vessel, but stress-related behaviors can. Heavy lifting, forceful coughing, and straining can all trigger a hemorrhage, and these may happen more often during stressful periods.
Is a broken blood vessel in the eye a sign of a stroke?
No. A subconjunctival hemorrhage is not a sign of a stroke and does not increase your risk of having one. It is a local event confined to the surface of the eye.
Should I go to the ER for a broken blood vessel in the eye?
No, unless you have pain, vision changes, or a direct eye injury. A painless red patch with normal vision does not require emergency care.
