A red spot on the white of your eye is almost always a subconjunctival hemorrhage, which is a tiny broken blood vessel just beneath the clear surface membrane. It looks alarming but is painless, harmless, and clears up on its own within about two weeks. That said, not every red spot is a simple broken vessel. The location, size, and any accompanying symptoms like pain or blurred vision help distinguish the common, harmless kind from the few causes that need attention.
The Most Common Cause: A Broken Blood Vessel
The white of your eye is covered by a thin, transparent membrane called the conjunctiva. Tiny blood vessels run through it, and when one of them bursts, blood gets trapped in a flat, bright-red patch. You might notice it in the mirror or have someone else point it out. There’s no pain, no discharge, and no change in your vision. It just looks dramatic.
These breaks happen when pressure briefly spikes in the small veins around your eye. Common triggers include:
- Coughing, sneezing, or vomiting
- Straining on the toilet
- Heavy lifting or bending forward
- Rubbing your eye too hard
- A minor bump or injury to the eye or head
Sometimes you wake up with one and have no idea what caused it. That’s normal too. Many subconjunctival hemorrhages happen during sleep, possibly from pressing your face into a pillow or from a coughing fit you don’t remember.
How It Heals
Your body reabsorbs the trapped blood gradually, much like a bruise fading on your skin. Over the course of one to two weeks, the bright red patch may shift to orange, then yellow, then disappear entirely. A larger spot can take a bit longer. There’s nothing you can do to speed up the process. Cool compresses on closed eyelids can feel soothing, and preservative-free artificial tears help if the area feels mildly irritated or dry, but neither treatment makes the blood clear faster.
Avoid rubbing the eye while it heals. If you take blood thinners like aspirin or warfarin, don’t stop them because of a red spot, but it’s worth mentioning it at your next appointment. Blood-thinning medications make these hemorrhages more likely and sometimes more frequent.
Health Conditions That Make It Happen More Often
An occasional broken blood vessel in the eye is nothing to worry about. Recurring ones, especially if you’re over 50, can be a signal worth investigating. High blood pressure is the most common underlying factor in older adults. The elevated pressure in your blood vessels makes the delicate conjunctival vessels more prone to bursting. Diabetes has a similar effect, causing microvascular damage that leaves those tiny vessels fragile.
Long-term use of steroid eye drops (often prescribed for conditions like uveitis) also weakens vessel walls and raises the chance of spontaneous hemorrhages. If you keep getting red spots and you’re on any of these medications, or if you haven’t had your blood pressure checked recently, that pattern is worth bringing up with your doctor.
When a Red Spot Isn’t a Broken Vessel
A straightforward subconjunctival hemorrhage has a specific look: a flat, solid patch of red on the white of the eye, with no pain and no vision changes. If what you’re seeing doesn’t match that description, a few other conditions are possible.
Blood in Front of the Iris (Hyphema)
If the blood is pooling in the colored part of your eye rather than on the white, that’s a hyphema. This typically happens after an injury, like getting hit in the eye with a ball or an elbow. Unlike a simple broken vessel, a hyphema hurts and causes blurred or distorted vision. It needs prompt evaluation because blood in that part of the eye can raise pressure inside the eye and damage vision permanently if left untreated.
Inflammation of the Eye Wall
Sometimes redness on the white of the eye comes from inflammation of the tissue layers rather than from a burst vessel. Episcleritis, an inflammation of the outer coating, creates a localized patch of redness that can look similar to a hemorrhage but tends to appear more pink or salmon-colored and may feel slightly gritty. It’s usually mild and not painful. Scleritis, which affects a deeper layer, is a different story: it causes severe, deep eye pain that can wake you up at night, along with light sensitivity. Scleritis requires treatment to prevent complications.
Growths on the Eye Surface
A pinguecula is a small, raised, yellowish or white bump on the white of the eye, caused by deposits of protein, fat, or calcium. It can become irritated and red, which might make it look like a red spot. A pterygium is a wedge-shaped tissue growth that can extend from the white of the eye onto the cornea. Both are linked to sun and wind exposure (pterygium is sometimes called “surfer’s eye”) and are benign, though a pterygium may eventually need removal if it grows large enough to affect vision.
Pigmented Spots
If the spot is brown or dark rather than red, it could be a conjunctival nevus, essentially a freckle on the eye. These are very common, tend to appear in younger people (average age around 21 at diagnosis), and are almost always benign. Conjunctival melanoma, while rare, typically appears in older adults (average age around 67) and tends to be larger. Any new or growing dark spot on the eye should be checked, but the vast majority turn out to be harmless freckles that just need periodic monitoring.
Signs That Need Prompt Attention
A painless red patch with normal vision is almost certainly a subconjunctival hemorrhage, and you can safely let it resolve. But certain symptoms alongside a red spot change the picture. Eye pain, blurred or distorted vision, light sensitivity, or discharge all suggest something beyond a simple broken vessel. The same goes for a red spot that appeared after a direct injury to the eye, since trauma can cause internal damage that isn’t visible from the outside. In any of these cases, an eye exam can catch problems early, when they’re easiest to address.