What is a burst blood vessel in the eye?
Have you just noticed a patch of blood in an eye? This can look alarming. But most of the time it's completely harmless and nothing to worry about. In this guide, you'll learn about symptoms of a blood vessel burst in the eye (known as a subconjunctival haemorrhage), causes, treatments and more.
Here's what happens when a blood vessel bursts in an eye.
Sclera: These are the whites of your eyes.
Conjunctiva: This is a thin, transparent layer that covers the sclera.
Blood vessels: Tiny blood vessels known as capillaries are found beneath the surface of the conjunctiva.
Subconjunctival haemorrhage: If a blood vessel bursts, blood will collect in the space between the sclera and conjunctiva.
Symptoms of a blood vessel burst in the eye
Having a burst or popped blood vessel is quite common. It usually only affects one eye at a time, though it can affect both. Many people find having a patch of blood in their eyes very concerning ‑ and it's totally normal to feel worried. But rest assured that in most cases, it's nothing to worry about and will clear up by itself.
Here are the main signs and symptoms you'll notice.
Red patch on part of the eye ‑ There's a patch of red in just one part of the sclera (the whites of your eyes). The rest of the sclera looks normal. This is more common when the popped blood vessel is related to an injury.
Most of the eye is red ‑ Sometimes, most or all of the sclera looks red, and it can seem really alarming. This is more common when the issue is related to problems with blood vessels.
Mild aching ‑ Unlike some other eye conditions that can cause redness around the eye, a burst blood vessel doesn't usually cause pain. Some people, however, do notice some mild aching or discomfort.
No change in vision ‑ It's very rare for a broken blood vessel in the eye to cause any changes to your vision. Your sight should be completely normal.
Gradual colour change – A burst vessel starts bright red with clear edges, then fades to brown and yellow as it heals. Just like a bruise.
Discomfort ‑ Most people don't notice any pain when a blood vessel bursts in the eye. But some people find the eye feels sore or scratchy. You may also get discomfort or an ache around the eye.
Popping feeling – Some feel a mild pop as it happens, but most only notice when they see it in the mirror or when someone points it out.
Causes of a burst eye vessel
Burst eye blood vessels can have several causes, but often the cause is unknown.
Sneezing, coughing or vomiting
Sudden pressure from sneezing, coughing, vomiting or lifting heavy weights can raise blood pressure and cause a burst vessel in the eye. Learn more about hay fever.
Contact lenses
Putting lenses in or taking them out roughly can burst vessels. Damaged lenses can also scratch the eye. Learn more about contact lenses.
Eye trauma
Rubbing too hard, getting something in your eye, or a knock to the eye can all burst blood vessels. Learn more about the feeling of something in your eye.
Eye surgery
If you've recently had eye surgery, for things like cataracts or glaucoma, it's fairly common to get a subconjunctival haemorrhage. This might be caused by the procedure itself, or things like an anaesthetic injection in the eye. Learn more about glaucoma.
Eye conditions
Certain eye conditions might make people more likely to rub their eyes vigorously. These include things like dry eye syndrome, blepharitis and allergic reactions. Learn more about blepharitis.
High blood pressure (hypertension)
This is when the pressure of your blood against the walls of your blood vessels is too high. Various studies have shown that burst eye vessels are more common among people with high blood pressure. Learn more about ocular hypertension.
Medicines that thin the blood
Several kinds of medicine can thin your blood, and this can make subconjunctival haemorrhage more likely. These include things like warfarin, heparin and aspirin (among others).
Vein‑related conditions
Issues like diabetes or high cholesterol can make eye vessels more fragile and more likely to burst. Learn more about diabetic retinopathy.
Tumours and growths
Some eye growths can raise the risk of burst vessels. They’re often harmless but should be checked by a doctor.
Getting older
It’s more common after 50, as the tissues and fibres in the eye get more fragile with age.
Periods
This is rare, but there have been some reports of women repeatedly getting a blood vessel burst in their eyes at the start of their periods.
Rare diseases
A burst eye vessel is also associated with a few rare diseases, including Stevens‑Johnson syndrome, hemochromatosis, Kaposi sarcoma and dermatologic vasculature diseases. Book an appointment.
Who's more likely to have a burst eye vessel?
Anyone can get a burst eye vessel. However, research shows that people aged 50+ are most affected (older women seem to get it more). This might simply be due to ageing or because they're more likely to have conditions like hypertension. Among younger people, injuries are the main cause. Studies show men get it most likely due to the physical activities they do. Book an appointment.
How is a burst blood vessel in the eye diagnosed?
Diagnosis for a burst eye vessel
Most of the time, getting a blood vessel burst in your eye is nothing to be worried about, and it will go away by itself. It doesn't usually need medical attention. However, there are times when it is worth getting it seen by your GP or an optometrist. Your doctor or eye specialist will inspect your eye, ask about when the issue started, your medical history and any medication you take.
Repeated burst blood vessels in your eye
If you keep getting a blood vessel burst in your eye, then it's worth getting this checked. Repeated subconjunctival haemorrhage could be a sign of more serious conditions like a vascular (vein) disorder.
It's very painful.
Having a popped blood vessel in your eye is usually painless, or ‑ at most ‑ a bit sore. If your eye is very painful, or if it feels like something has pierced the surface of the eye itself, you should go to A&E. You should also get medical help if your vision has changed, if you feel or are sick, see halos around lights or just generally feel unwell. Learn more about eye pain.
You had an eye injury.
You should get medical help for any kind of physical impact to your eye, your face, or your head that also caused a burst blood vessel in your eye. There are some kinds of eye injury (such as globe rupture or retinal detachment) that could damage your sight if not treated fast. Learn more about retinal detachment.
Treatment for a burst eye vessel
In the majority of cases, there's no specific broken blood vessel in eye treatment, and it just needs rest. It will usually clear up on its own as your body reabsorbs the blood that escaped from the capillary. The blood will usually clear up in 1‑3 weeks.
However, there are a few things you can do to help your body recover.
Avoid strenuous activities ‑ If the patch of blood appeared in your eye after strenuous exercise (like weight lifting), it's best to avoid these while the issue clears up.
Get eye conditions treated ‑ Some people get burst eye vessels because they rub their eyes to help with symptoms of dry eye syndrome or blepharitis. By getting the underlying cause treated, you'll be less tempted to rub your eyes. Learn more about dry eye syndrome.
Use antihistamines ‑ If you get burst eye vessels because you sneeze, cough or rub your eyes a lot because of allergies, then antihistamines can help with managing allergies to things like pollen, pet hair or dust mites.
Don’t wear contacts – Wait until the blood clears and your eye heals, as lenses can irritate the area.
Treat other conditions – Managing issues like high blood pressure, diabetes, or high cholesterol can help prevent burst vessels.
Cold compress – If your eye feels sore or tender, a chilled, damp cloth over your eyelid can help ease it.
Eyedrops – Artificial tears can ease dryness or scratchiness. You can get them from pharmacies or Specsavers.
How to put in eye drops
Our optometrists know that getting the hang of eye drops can take a bit of practice. We’ll show you how to do it step by step, so you feel confident using them at home. That includes tips for making it easier, like getting into the right position, not blinking too soon, and keeping things clean. If you ever have trouble or something doesn’t feel right, we’re always here to help.
Book an appointmentPreventing a blood vessel burst in the eye
It's not always possible to avoid getting a popped blood vessel in your eye. Some things ‑ like sneezing ‑ aren't directly in your control. But the following tips might reduce your chances of it happening.
Regular eye tests ‑ A broken blood vessel in the eye could be a sign of other eye and general health issues. Having regular eye checks means optometrists are more likely to pick things up sooner.
Avoid straining – Build up strength slowly and get help with heavy lifting to avoid pressure that can burst eye vessels.
Manage blood pressure ‑ If you have high blood pressure, speak to your GP about ways to manage this. They might suggest taking certain medications. But changes to your diet and lifestyle can also really help.
Don't rub your eyes ‑ Eye rubbing is a common cause of subconjunctival haemorrhage. If your eyes feel sore and itchy, consider using a cold compress to relieve discomfort instead.
Take care of contact lenses ‑ Damage to contact lenses can cause scratches that lead to burst eye vessels. Follow the care instructions on the packaging, and throw away any damaged lenses.
Head and eye protection ‑ Broken blood vessels in the eye can happen when you hit your head or objects fly into your eye. Wear suitable head and eye protection at work, when doing DIY, or taking part in sports.
Related conditions
Not sure if this is what you're experiencing? Explore some related conditions:
Conjunctivitis (red or pink eye)
Conjunctivitis is a common condition caused by inflammation of the thin layer of tissue that covers the front of the eye and inner surfaces of the eyelid.
Find out moreDry Eye Syndrome
Dry eye syndrome is a condition that happens when your eyes don’t produce enough tears or if the quality of your tears isn’t quite right.
Find out moreFeeling of something in the eye
Often it’s just dust or an eyelash, but sometimes it's a sign of something more serious, such as an eye injury which requires further care.
Find out more
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Burst eye vessel FAQs
Unfortunately, it isn't possible to heal a broken blood vessel in your eye fast. A subconjunctival haemorrhage is similar to a bruise on your skin. It just takes a few days or weeks to fade away by itself. If you don't like how it looks, you might want to wear sunglasses when outdoors.
There are lots of causes of burst blood vessels in the eye. The most common include having high blood pressure, sudden, violent movements like sneezing or throwing up, and injuries to the surface of the eye. But in up to half of cases, doctors don't know why they happen.
We generally advise against wearing contacts while your eye is healing. Putting lenses in or taking them out could irritate the eye and slow down recovery. It may also increase the risk of an infection.
You don't usually need to see a doctor about a subconjunctival haemorrhage. It will normally just clear up by itself. However, if it's painful, keeps on happening, or you recently had an eye or head injury, it's important to get it checked by a doctor.
If a capillary in your conjunctiva has burst, the actual damage to the vein normally heals up extremely quickly (it can clot in as little as a minute). The patch of blood you see is what 'leaked' out when the vein burst. This isn't, in and of itself, an injury. The blood then gradually gets reabsorbed into your body over the course of a couple of weeks.
No, a burst blood vessel in your eye is different to an eye stroke. An eye stroke is when there's a blockage in the veins that deliver blood to the retina ‑ it's very serious and can cause lasting damage to your sight. A burst blood vessel in the eye can look very alarming, but it is very rarely a sign of anything serious.
There are lots of reasons you might have woken up with a popped blood vessel in your eye. If you have high blood pressure, this could be behind it. You might have coughed or sneezed during the night, and this caused the patch. Or you may have accidentally rubbed your eyes while asleep.
Yes, it's safe to fly with a patch of blood in an eye. It's normally a harmless condition, and won't be affected by things like cabin pressure.
Bercin, T., Kiratil, H. (2013) Subconjunctival hemorrhage: risk factors and potential indicators. Available at: https://pmc.ncbi.nlm.nih.gov/articles/PMC3702240/
Chiang, P., et al. (2021) Association Between Subconjunctival Hemorrhage and Acute Coronary Syndrome: A 14‑Year Nationwide Population‑Based Cohort Study. Available at: https://pmc.ncbi.nlm.nih.gov/articles/PMC8518183/
Doshi, R., and Noohani, T. (2023) Subconjunctival Hemorrhage. Available at: https://www.ncbi.nlm.nih.gov/books/NBK551666/
Gauba, V. et al. (2006) Vicarious Menstruation in Primary Localized Conjunctival Amyloidosis. Available at: https://jamanetwork.com/journals/jamaophthalmology/fullarticle/417864
Mayo Clinic (2025) Subconjunctival hemorrhage. Available at: https://www.mayoclinic.org/diseases‑conditions/subconjunctival‑hemorrhage/symptoms‑causes/syc‑20353826
Medical News Today (2024) Burst blood vessel in eye: what to know. Available at: https://www.medicalnewstoday.com/articles/burst‑blood‑vessel‑in‑the‑eye#overview
Moorfileds Eye Hospital (2025) Sub‑conjunctival haemorrhage. Available at: https://www.moorfields.nhs.uk/for‑health‑professionals/common‑eye‑condition‑management/sub‑conjunctival‑haemorrhage
