A red spot on the white of your eye is almost always a subconjunctival hemorrhage, a tiny broken blood vessel that leaks blood under the clear surface layer. It looks alarming but is painless, harmless, and clears up on its own within one to three weeks without any treatment. If your red spot comes with pain, vision changes, or discharge, something else may be going on, and the cause changes what you should do about it.
Broken Blood Vessels: The Most Common Cause
A subconjunctival hemorrhage happens when a small blood vessel on the surface of your eye bursts and blood pools underneath the conjunctiva, the thin transparent membrane covering the white part. The result is a bright red patch that can range from a tiny dot to a large blotch covering most of the white. It doesn’t affect your vision or cause pain, though you might feel a mild scratchy sensation.
Common triggers include coughing, sneezing, vomiting, straining on the toilet, heavy lifting, rubbing your eye too hard, or a minor bump to the eye. Blood-thinning medications like warfarin and aspirin increase the risk. Contact lens wear and eye infections can also cause one. Sometimes there’s no obvious trigger at all.
You can’t speed up the healing process. The blood reabsorbs gradually, often shifting from red to yellow or green before disappearing entirely, much like a bruise on your skin. Most spots clear within a few days to a few weeks. While it heals, you can use preservative-free artificial tears up to four times a day if the eye feels irritated, and place a cool compress or clean washcloth over your closed eye a couple of times daily for comfort. Avoid rubbing the eye, which can worsen the bleeding or cause a new one.
How to Prevent It From Happening Again
If you get subconjunctival hemorrhages repeatedly, look at the patterns. Frequent hard coughing or sneezing from allergies or illness is a common culprit, and treating the underlying condition helps. If you strain during heavy lifting, exhale through the effort rather than holding your breath, which spikes the pressure in your veins. Managing high blood pressure reduces the likelihood as well.
Stop rubbing your eyes. If they itch from allergies, over-the-counter antihistamine eye drops can relieve the urge. If you wear contact lenses, make sure they fit properly and follow your replacement schedule, since poorly fitting lenses irritate the surface and make blood vessels more fragile. If you take blood thinners, don’t stop them over a harmless spot, but mention recurring hemorrhages to your doctor so they can review your dosing.
Other Causes of a Red Spot on the Eye
Not every red spot is a broken blood vessel. A few other conditions can look similar but behave differently.
Pinguecula and Pterygium
A pinguecula is a small yellowish or slightly reddish raised bump on the white of the eye, caused by long-term sun and wind exposure. It rarely causes symptoms and almost never needs removal. A pterygium is a wedge-shaped growth of tissue that starts on the white of the eye and can slowly creep toward the cornea. Both can become red and inflamed, especially after UV exposure or dry, windy conditions.
For a pterygium that’s irritating your eye, over-the-counter lubricating drops and short courses of prescription anti-inflammatory drops can help. Wearing wraparound UV sunglasses and a hat outdoors slows its growth. Surgery is recommended only if the growth threatens your vision by approaching the cornea, causes persistent discomfort, or bothers you cosmetically. Surgeons typically patch the removal site with tissue from elsewhere on your eye or with donated amniotic membrane. Recurrence rates after surgery range from about 2% to 15%.
Episcleritis
Episcleritis is inflammation of the thin layer of tissue between the white of the eye and the clear surface membrane. It produces a localized patch of redness, often in one section of the eye, with mild tenderness but usually no significant pain. It can look like a broken blood vessel but feels different because the area is slightly tender to the touch and the redness may have a pinkish or violet tint rather than the bright red of pooled blood.
Most cases respond to anti-inflammatory eye drops prescribed by an eye doctor. Only about 17% of episcleritis patients need anything stronger than topical drops. It often resolves within a couple of weeks with treatment, though it can recur.
Scleritis
Scleritis is a deeper, more serious inflammation of the sclera itself (the tough white wall of the eye). It causes intense, boring pain that can radiate to the head and face and often worsens at night. The redness tends to look deeper, sometimes with a bluish or purplish hue. Nearly 60% of scleritis patients need oral anti-inflammatory medications or stronger immune-suppressing drugs to control the disease. This is not something to manage at home.
Safe Home Care for General Eye Redness
When you’re dealing with a red spot or mild redness that isn’t painful and doesn’t affect your vision, a few simple measures can help. Cool compresses over closed eyes a couple of times a day reduce irritation. Preservative-free artificial tears flush out allergens and keep the surface lubricated. If allergies are driving the redness, over-the-counter antihistamine eye drops target the itchiness directly.
Decongestant eye drops (the kind that “get the red out”) shrink blood vessels and make redness disappear temporarily, but you should avoid using them for more than three days. Longer use causes rebound redness, where the blood vessels dilate even more once the drops wear off, leaving your eyes redder than before. One newer decongestant ingredient, brimonidine, avoids this rebound effect, though it shouldn’t be used in children.
Signs a Red Spot Needs Urgent Attention
A painless red patch with no vision changes is almost never an emergency. But certain combinations of symptoms signal something that can damage your vision within hours if left untreated.
- Severe eye pain that feels deep or boring, especially if it radiates to your head and face or worsens at night
- Sudden vision loss or blurring alongside redness in the same eye
- Extreme light sensitivity where normal room lighting feels unbearable, particularly if light in one eye causes pain in the other
- Thick colored discharge (green, yellow, or bloody) with worsening pain or fever
- Redness following an injury or chemical splash, especially alkaline substances like cleaning products
- Seeing halos around lights combined with nausea, which can indicate a dangerous spike in eye pressure
- Neurological symptoms like severe headache with confusion, double vision, facial drooping, or neck stiffness with fever
Redness in only one eye is generally more concerning than redness in both, since bilateral redness often points to allergies or a viral infection, while a single red eye more frequently reflects a localized problem that needs evaluation. Vision loss from conditions like acute glaucoma or a serious infection can begin within two to six hours, so these combinations warrant same-day or emergency care rather than a wait-and-see approach.