A red spot on the white of your eye is almost always a subconjunctival hemorrhage, which is a tiny broken blood vessel that leaks blood under the clear surface layer of your eye. It looks alarming but is painless, harmless, and heals on its own within about two weeks. That said, not every red spot is the same, and a few other conditions can look similar while needing different attention.
The Most Common Cause: A Broken Blood Vessel
The white part of your eye is covered by a thin, clear membrane called the conjunctiva. Tiny blood vessels run through it, and when one breaks, blood gets trapped underneath. Because it has nowhere to go, it pools into a bright red patch that can range from a small dot to a large blotch covering most of the white of your eye. The color is vivid and flat, almost like a spot of red paint.
These broken vessels happen more often than you’d think, and the triggers are surprisingly mundane. Sneezing hard, coughing, vomiting, straining during a bowel movement, heavy lifting, or rubbing your eyes too aggressively can all cause one. Sometimes you wake up with a red spot and have no idea what caused it. That’s normal too.
Certain factors raise your risk. Blood-thinning medications (including daily aspirin) make blood vessels more likely to leak and harder to clot once they do. High blood pressure puts extra strain on small vessels throughout your body, including those in your eyes. If you’re getting these spots repeatedly, it’s worth having your blood pressure checked, since your eyes may be signaling a problem elsewhere.
What Healing Looks Like
Most subconjunctival hemorrhages clear up within two weeks without any treatment. Larger spots can take a bit longer. As the blood reabsorbs, the spot often shifts in color from bright red to yellow or green, much like a bruise on your skin fading over time. There’s no way to speed this process up.
If the spot feels mildly scratchy or irritated, over-the-counter artificial tears can help. Use them up to four times a day, and choose preservative-free drops if you need them more frequently than that. Avoid “redness relief” drops for this purpose. They work by constricting blood vessels, which doesn’t help a hemorrhage that’s already happened and can cause rebound redness with repeated use.
Other Conditions That Cause Red Spots
While a broken blood vessel is the most likely explanation, a few other conditions can produce redness on or near the white of your eye, and they look and feel different enough to tell apart.
Episcleritis
This is inflammation of the thin tissue layer just beneath the conjunctiva. Rather than a flat, blood-red patch, episcleritis produces a localized area of pinkish-red irritation, often in a wedge or sector shape. The key difference is discomfort: episcleritis typically causes mild aching or tenderness, while a simple broken blood vessel doesn’t hurt at all. Episcleritis usually resolves on its own within a week or two but sometimes needs anti-inflammatory drops.
Pinguecula
A pinguecula is a small, raised bump on the white of the eye, usually yellowish or white but sometimes reddish when inflamed. It’s made up of protein, fat, or calcium deposits and tends to sit on the inner or outer side of the eye near the colored part. It’s caused by long-term UV exposure and chronic dryness. Unlike a hemorrhage, a pinguecula doesn’t appear overnight and doesn’t go away on its own, though it’s generally harmless.
Pterygium
Sometimes called surfer’s eye, a pterygium is a raised, wedge-shaped growth of tissue that can extend from the white of the eye onto the cornea (the clear dome over your iris). Like a pinguecula, it’s driven by UV exposure and chronic irritation, and it develops gradually over months or years. It can become red and inflamed and may eventually affect your vision if it grows far enough across the cornea.
When the Red Is Inside the Eye
A subconjunctival hemorrhage sits on the surface, over the white part of your eye. A different and more serious condition called a hyphema involves blood pooling inside the eye, in the space between the cornea and the iris (the colored ring). With a hyphema, the blood appears to sit over or around your eye color rather than on the white. It’s usually caused by a direct blow to the eye.
The difference is hard to miss. A hyphema causes pain, blurred or distorted vision, and sometimes nausea or vomiting, which can signal dangerously high pressure inside the eye. A surface hemorrhage causes none of these symptoms. If you see blood near your iris and your vision is affected, that’s an emergency.
Signs That Need Immediate Attention
A painless red patch on the white of your eye, with no vision changes, almost never needs urgent care. But certain symptoms alongside eye redness warrant a same-day or emergency visit:
- Sudden vision changes, including blurriness, distortion, or seeing halos around lights
- Eye pain, especially combined with a headache or sensitivity to light
- Nausea or vomiting along with eye redness
- Swelling in or around the eye
- A chemical splash or foreign object that caused the redness
- Inability to open or keep your eye open
If your red spot is painless, your vision is fine, and you feel normal otherwise, you can safely monitor it at home. It should start fading within a few days and be gone within two weeks. If it keeps recurring, or if it hasn’t cleared after three weeks, that’s a reasonable time to have it looked at.