A broken blood vessel in the eye, known medically as a subconjunctival hemorrhage, almost always heals on its own without treatment. The bright red patch you see is blood trapped beneath the clear surface layer of your eye, and it typically clears up within two to three weeks. While it can look alarming, it’s painless, doesn’t affect your vision, and rarely signals anything serious.
That said, there are practical steps you can take to stay comfortable while it heals, and a few situations where you should get it checked.
Why It Happens
The white of your eye is covered by a thin, transparent membrane packed with tiny blood vessels. When one of those vessels breaks, blood leaks into the space between that membrane and the eye’s surface. Because there’s nowhere for the blood to go, it pools into a vivid red or dark patch that’s easy to spot.
Common triggers include coughing, sneezing, straining (like during heavy lifting or a hard bowel movement), vomiting, and rubbing your eyes. A minor bump or poke to the eye can do it too. Sometimes there’s no obvious cause at all.
Certain health conditions and medications raise your risk. High blood pressure, diabetes, and blood-clotting disorders all make these vessels more fragile. Blood-thinning medications like warfarin and aspirin increase both the likelihood and the size of the hemorrhage. If you take a blood thinner and notice this happening, it’s worth mentioning to your prescribing doctor, as the dosage may need to be reviewed.
Home Care That Helps
Since the hemorrhage resolves on its own, treatment is really about comfort. Here are the most effective steps:
- Cold compress: Apply a cold pack or ice wrapped in a cloth to the affected eye for 10 to 15 minutes, several times a day. Cold restricts blood flow to the area, which can reduce swelling and ease any mild discomfort.
- Artificial tears: Over-the-counter lubricating eye drops can soothe irritation or dryness while the eye heals. They won’t speed up recovery, but they make the process more comfortable.
- Don’t rub the eye: Rubbing can worsen the bleeding or re-injure the vessel. Keep your hands away from the area even if it feels slightly itchy.
- Use acetaminophen for pain, not aspirin: If you feel any discomfort, acetaminophen is the safer choice. Aspirin and other blood thinners can prolong or worsen bleeding.
You don’t need to patch the eye, stay in a dark room, or restrict your activities. Normal daily life is fine.
What the Healing Process Looks Like
The blood spot will change color as your body reabsorbs it, similar to a bruise on your skin. Expect it to shift from bright red to darker red, then possibly to yellow or green before fading entirely. The full cycle takes anywhere from a few days to about three weeks depending on the size of the hemorrhage. Larger spots take longer. The color changes are a normal sign of healing, not a sign that something is going wrong.
When to Get It Checked
A straightforward broken blood vessel causes no pain and no vision changes. If you experience either of those, something else may be going on, and you should contact an eye care provider promptly.
You should also seek evaluation if the hemorrhage hasn’t cleared within two to three weeks, if you have a history of eye injury, or if broken blood vessels keep recurring. Repeated episodes without an obvious trigger can sometimes point to uncontrolled high blood pressure, a clotting problem, or, in rare cases, a growth on the surface of the eye. Research has found that unexplained recurrent hemorrhages in older adults may even predict future development of hypertension. A simple blood pressure check and basic blood work can rule out the more concerning possibilities.
Reducing Your Risk of Recurrence
You can’t always prevent a blood vessel from breaking, but you can lower the odds. If you have high blood pressure or diabetes, keeping those conditions well managed makes a real difference in vessel health. Wearing protective eyewear during sports or any activity where something could hit your face is a straightforward precaution. Avoid rubbing your eyes forcefully, especially during allergy season when the temptation is high. If chronic coughing or frequent sneezing is a trigger for you, treating the underlying cause (allergies, a lingering cold, acid reflux) removes the mechanical stress on those tiny vessels.
For people on blood thinners, the risk is inherently higher, and prevention is more about awareness than avoidance. Knowing that a red spot on your eye is likely harmless, rather than a reason to panic, can save you unnecessary worry the next time it happens.