A broken blood vessel in the eye almost always heals on its own within two weeks, and most cases need no treatment at all. That bright red patch on the white of your eye looks alarming, but it’s essentially a bruise under the clear surface of the eye. The medical term is subconjunctival hemorrhage, and while it can be startling to see in the mirror, it’s rarely a sign of anything serious.
Why It Looks Worse Than It Is
The white of your eye is covered by a thin, clear membrane called the conjunctiva. Tiny blood vessels run through this membrane, and when one breaks, blood gets trapped in the space between the conjunctiva and the eye’s surface. Because there’s nowhere for the blood to go, it spreads out and creates a vivid red patch that can cover a large area of the white. The eye has no way to quickly drain this blood, so it sits there until your body gradually reabsorbs it.
The condition is painless. It doesn’t affect your vision, and it doesn’t cause discharge or swelling. If you’re experiencing any of those symptoms, something else is going on.
What Causes a Blood Vessel to Break
Sometimes there’s no identifiable trigger at all. You wake up, look in the mirror, and there it is. But the most common causes involve sudden pressure increases in the blood vessels of the eye. Coughing, sneezing, straining, vomiting, and even rubbing your eye too hard can rupture a tiny vessel. A strong sneeze alone is enough to do it.
Certain conditions make it more likely to happen. High blood pressure puts extra strain on small vessels throughout the body, including the eye. Diabetes damages blood vessel walls over time, making them more fragile. Blood-thinning medications like aspirin and warfarin don’t just increase the chance of a vessel breaking; they also make the resulting hemorrhage larger. People on blood thinners who also have high blood pressure are at particularly high risk for bigger, more visible bleeding episodes. Minor trauma, like bumping or poking the eye, is another common cause.
How to Help It Heal
There’s no medication or procedure that speeds up the core healing process. Your body reabsorbs the blood at its own pace. Most cases clear within two weeks, though larger spots can take longer. As the blood breaks down, the patch may shift in color from bright red to yellow or green before disappearing entirely, much like a bruise on your skin.
That said, there are a few things you can do to stay comfortable and support recovery:
- Use artificial tears. The hemorrhage itself doesn’t hurt, but some people notice a mild scratchy or itchy sensation. Over-the-counter lubricating eye drops can relieve this.
- Apply warm compresses. Placing a warm (not hot) cloth over the closed eye at least three times a day helps increase circulation to the area, which enhances the breakdown of clotted blood and can speed up recovery. Cold compresses won’t help here, despite being a common instinct.
- Avoid rubbing your eye. This can re-irritate the area or even rupture another vessel.
- Skip aspirin and ibuprofen if possible. These thin the blood and may prolong the hemorrhage. If you take a prescribed blood thinner, don’t stop it on your own, but it’s worth mentioning the eye bleed at your next appointment.
How to Tell It Apart From Something Serious
A subconjunctival hemorrhage sits on the white of the eye, is painless, and doesn’t affect your sight. A more serious condition called hyphema involves bleeding inside the eye, between the cornea and the colored part of the iris. With hyphema, the blood appears to pool in front of your eye color rather than on the white. Hyphema causes pain, blurred or distorted vision, and requires prompt medical attention.
If your broken blood vessel comes with eye pain, vision changes, bleeding that started after significant trauma (not just a bump), or blood that appears to be inside the eye rather than on the surface, those are signs of a different and more urgent problem.
Recurring Broken Blood Vessels
A single episode is common and rarely worth worrying about. But if it keeps happening, it may point to an underlying issue. Uncontrolled high blood pressure is one of the most frequent culprits behind repeated episodes. Diabetes and blood-clotting disorders are others. If you’ve had more than two or three subconjunctival hemorrhages within a year, it’s worth having your blood pressure checked and mentioning the pattern to your doctor. The eye itself is fine, but recurring breaks can be an early signal that something systemic needs attention.
Reducing the Risk
You can’t prevent every broken blood vessel, but you can lower the odds. Keeping blood pressure well controlled is the single most impactful step for people prone to recurrence. Wearing protective eyewear during sports or activities with a risk of eye contact helps prevent trauma-related cases. If you find yourself frequently straining during bowel movements (a surprisingly common trigger), increasing your fiber and water intake reduces that pressure. And if you wear contact lenses, handle them gently and avoid rubbing your eyes when they feel dry. Use lubricating drops instead.