A ruptured blood vessel in the eye — called a subconjunctival haemorrhage — is a tiny leak of blood beneath the clear surface (conjunctiva) that covers the white of your eye. It shows up as a bright red patch. Despite the dramatic look, it usually doesn’t hurt, doesn’t cause discharge or blur vision, and settles on its own, often after a cough, sneeze, strain or eye rub.
In this guide, you’ll learn what it looks and feels like, how to judge when it’s serious, common triggers and who’s at higher risk, how long healing takes, what helps at home and what to avoid, and when to seek care. We’ll also cover tests, look-alike conditions, special situations, prevention, and quick myth-busters.
What a ruptured blood vessel in the eye looks and feels like
A ruptured blood vessel in the eye shows as a vivid red patch on the white (sclera) beneath the eye’s clear surface. The blood is trapped under the conjunctiva, so it doesn’t move or wipe away. Most people feel normal: no pain, no discharge and no change in vision. Some notice mild itchiness or a gritty, “something-in-the-eye” sensation. The colour then slowly fades over time, much like a bruise.
- Bright red patch: Sharply defined on the white of the eye
- Vision unaffected: No pain, no discharge
- Sensation: Mild irritation or gritty feeling is possible
- Fading: Colour lightens over 1–2 weeks as it clears
Is a ruptured blood vessel in the eye serious?
Usually not. A subconjunctival haemorrhage looks dramatic but is typically harmless, painless and doesn’t affect vision. It’s akin to a bruise under the eye’s clear surface and generally clears on its own within 1–2 weeks (larger patches can take a little longer). Complications are rare, but recurrent episodes can signal an underlying issue such as high blood pressure, diabetes or a bleeding tendency.
- Seek care urgently if: you have eye pain, light sensitivity or any vision change.
- After an injury: get assessed to rule out deeper eye damage.
- If it keeps happening: see your GP/optometrist for blood pressure and bleeding checks.
- If you bruise/bleed easily or take blood thinners: arrange a review.
Common causes of a ruptured blood vessel in the eye
Most episodes follow something that briefly raises pressure in the small veins of the eye or causes minor surface trauma. Everyday triggers are common, and a ruptured blood vessel in the eye can also occur with no clear reason at all.
- Coughing, sneezing or straining: Sudden pressure spikes (including vomiting or straining on the toilet) can pop a tiny vessel under the conjunctiva.
- Heavy lifting or bending forward: Exertion has a similar short-lived pressure effect.
- Eye rubbing or minor knocks: Fingernails, a poke, or a foreign body can shear a small vessel.
- Contact lenses: Insertion/removal, dry or dirty lenses, or lens-related irritation increase rubbing and friction.
- After eye surgery: The surface is more vulnerable while healing.
- Dry eye or allergies: Itch and grittiness lead to rubbing that triggers a small bleed.
- Medicines that thin blood: Anticoagulants and sometimes NSAIDs don’t cause the bleed but can make it more likely or larger.
- No obvious cause: Many subconjunctival haemorrhages are idiopathic and harmless.
Who is at higher risk
Anyone can get a subconjunctival haemorrhage, but some people are more prone to a ruptured blood vessel in the eye because their vessels are fragile or their blood is slower to clot. If you fall into any of these groups and the bleeds are frequent, it’s worth a blood pressure check and medication review.
- Older age (especially 65+): Fragiler surface vessels.
- High blood pressure and diabetes: Common vascular risk factors.
- Blood thinners/antiplatelets: e.g. warfarin, heparin, aspirin.
- Bleeding or clotting disorders: Such as haemophilia or von Willebrand disease.
- Contact lens wearers: Dryness and friction increase rubbing and micro‑trauma.
- Recent eye surgery: The surface is more vulnerable while healing.
How long it takes to heal and stages of recovery
A ruptured blood vessel in the eye usually clears on its own within 1–2 weeks. The exact timeline depends on the size of the bleed and whether you take blood‑thinning medicines; larger patches or those on anticoagulants can take closer to three weeks. Vision stays normal, but the eye can look worse before it looks better, as the trapped blood spreads a little then fades like a bruise.
- Days 0–2: Bright, sharply outlined red patch; mild grittiness possible.
- Days 3–7: Darker maroon, edges blur; may look larger before shrinking.
- Week 1–2: Yellowish tint as it fades; patch steadily contracts; vision unaffected.
- Up to 3 weeks: Slower resolution if the patch is large or you’re on blood thinners.
What you can do at home (and what to avoid)
Most subconjunctival haemorrhages need no treatment. Comfort measures can make a ruptured blood vessel in the eye feel better while nature does the healing. Vision should stay normal; the redness fades over 1–2 weeks. Focus on soothing the surface and avoiding anything that might re‑irritate it.
- Use lubricating drops: Artificial tears 3–4 times daily ease grit/itch.
- Apply a cool compress: Closed eye, 5–10 minutes at a time, to settle irritation.
- Rest the eye if needed: Short breaks from screens can reduce dryness and rubbing.
- Pause contact lenses if irritated: Switch to glasses until the eye feels normal.
- Avoid rubbing or poking: This can restart bleeding or delay recovery.
- Don’t change blood thinners yourself: Never stop warfarin, heparin or aspirin without medical advice.
- Be gentle with sneezing/coughing and straining: If possible, avoid heavy lifting until the redness begins to fade.
- Monitor only: Expect colour changes like a fading bruise; seek care if pain or vision changes develop.
When to see an eye doctor or go to urgent care
Most subconjunctival haemorrhages don’t need urgent treatment. But if you have a ruptured blood vessel in the eye and anything feels “off”, it’s safer to get checked. Use the guide below to decide on timing.
- Seek same-day care (urgent) if: you have eye pain, light sensitivity or any vision change; the red eye follows a head/eye injury; the redness is spreading fast; or the eye looks swollen or has discharge. Pain can signal a more serious problem (for example, hyphema).
- Book a prompt review if: episodes are frequent or occur in both eyes; you bruise or bleed easily; you’re on blood thinners and the patch is large; or it isn’t improving after 2 weeks (or 3 weeks on anticoagulants).
- Also wise: arrange a blood pressure check and medication review with your GP/optometrist if bleeds recur, especially with diabetes or hypertension.
How doctors diagnose it and what tests you might need
In most cases, diagnosis is straightforward. An eye care professional recognises the bright, sharply defined patch on the white of the eye with normal vision and no pain, which confirms a subconjunctival haemorrhage — a ruptured blood vessel in the eye. If you have pain, light sensitivity or recent trauma, they’ll look more closely for other causes that do need treatment.
- History: Cough/sneeze/strain, injury, contact lenses, recent eye surgery, diabetes, hypertension.
- Medication review: Especially anticoagulants and antiplatelets (e.g., warfarin, heparin, aspirin) and NSAIDs.
- Blood pressure check: Routine, and important if episodes recur.
- Eye examination: Confirms the typical pattern; rules out issues like hyphema when pain or vision changes are present.
- Further tests when indicated: If bleeds are frequent or you bruise easily, blood tests may assess for bleeding/clotting disorders (e.g., haemophilia, von Willebrand disease); after head/eye injury, ophthalmic assessment is advised.
Most people won’t need scans; the eye is simply monitored as the redness fades over 1–2 weeks.
Conditions that look similar and how to tell the difference
Not every red eye is a subconjunctival haemorrhage. The hallmark of a ruptured blood vessel in the eye is a bright, sharply edged red patch on the white of the eye with normal vision and no pain or discharge. If your symptoms don’t fit that pattern, consider these look‑alikes.
- Conjunctivitis (pink eye): Diffuse pink/red eye with discharge or crusting and often itch. Not a sharply bordered patch.
- Corneal abrasion/ulcer: Typically painful with light sensitivity and watering; vision may blur. This needs prompt care.
- Hyphema: Blood pools in front of the iris (coloured part), often after trauma. Usually causes pain and/or vision change — urgent assessment required.
- Dry eye or allergies: Burning or itch, stringy mucus and fluctuating comfort; redness is generalised, not a fixed blood spot.
- Contact lens irritation: Redness and discomfort while wearing lenses, easing when you stop; redness is usually diffuse, not a crisp patch.
If you’re unsure — especially with pain, sensitivity to light or any change in vision — seek same‑day eye care.
Special situations: contact lenses, pregnancy, babies and after eye surgery
Certain life stages and habits can make a subconjunctival haemorrhage — a ruptured blood vessel in the eye — a little more likely or a little more worrying. Here’s how to handle the common scenarios safely.
- Contact lenses: Pause lens wear if the eye feels gritty or looks red, and switch to glasses until comfortable. Keep lenses scrupulously clean, replace on schedule, and have the fit and materials reviewed if episodes recur, as dryness and friction increase risk.
- Pregnancy: Coughing, vomiting and straining with morning sickness can trigger harmless patches. If episodes are frequent, or you have headaches, swelling or raised blood pressure readings, mention it at your antenatal visit or see your GP.
- Babies: Around 1–2% of newborns can have a red patch after vaginal birth. It’s painless and typically clears in 1–2 weeks. Seek care sooner if there’s eye swelling, discharge or a history of injury.
- After eye surgery: The eye surface is more fragile while healing. Avoid rubbing, follow your surgeon’s drops and activity limits, and call promptly if you notice pain, light sensitivity, vision changes or blood pooling in front of the iris (possible hyphema).
Medicines and medical conditions that increase the risk
Some medicines thin the blood or affect platelets, and some health conditions make the tiny surface vessels more fragile. Together, they raise the chance of a subconjunctival haemorrhage — a ruptured blood vessel in the eye — or make the red patch larger and slower to clear. Don’t stop any prescribed medicine without medical advice.
Medicines that raise the chance
These can increase bleeding tendency or prolong recovery.
- Anticoagulants (warfarin, heparin) and antiplatelets (aspirin): More likely, larger patches that last longer.
- NSAIDs: May contribute to easier surface bleeding.
- Interferon: Linked with surface vessel bleeds.
Medical conditions linked
These conditions make episodes more likely or recurrent.
- High blood pressure: Common vascular risk factor.
- Diabetes: Can weaken small surface vessels.
- Bleeding/clotting disorders: e.g., haemophilia, von Willebrand disease.
- Vascular disease: Occasionally associated with recurrent episodes.
If bleeds recur, ask your GP or eye specialist to review your blood pressure, medicines and any underlying conditions.
Preventing future episodes
You can’t stop every subconjunctival haemorrhage, but you can cut the odds. The goal is to reduce friction on the eye’s surface, avoid brief pressure spikes, and stay on top of medical factors that make a ruptured blood vessel in the eye more likely.
- Don’t rub; lubricate instead: Use preservative‑free artificial tears if your eyes feel dry or itchy.
- Contact lens hygiene: Keep lenses clean, replace on schedule, and pause wear if the eye is irritated; have the fit reviewed if bleeds recur.
- Protect your eyes: Wear safety glasses for sports, DIY and dusty work.
- Control health risks: Check blood pressure regularly and keep diabetes well managed.
- Review medicines (don’t self‑stop): Ask your GP about anticoagulants, aspirin and NSAIDs if episodes are frequent.
- Reduce straining: Treat coughs/allergies, avoid heavy lifting where possible, and manage constipation.
- After eye surgery: Follow post‑op instructions and avoid rubbing while healing.
Living with recurrent red eyes: what your eye specialist may check
If you’re getting repeated episodes of a ruptured blood vessel in the eye, your specialist will look for patterns and contributors rather than the spot itself. Expect a targeted history (triggers, frequency, contact lenses, surgery) and a careful surface exam, plus a few simple checks to rule out common systemic causes. Most assessments are quick and non‑invasive.
- Blood pressure: Hypertension is a frequent contributor; a check is routine.
- Medicines: Review of anticoagulants (warfarin, heparin), aspirin, NSAIDs and interferon.
- Systemic risks: Diabetes status and coordination with your GP if needed.
- Slit‑lamp exam: Dry eye, allergy, contact lens fit, and surface changes (e.g., pinguecula) that increase friction.
- Trauma screen: Especially if episodes follow knocks or sport.
- Blood tests (when recurrent): To assess for bleeding/clotting disorders such as haemophilia or von Willebrand disease.
- Next steps: Most people won’t need scans; advice focuses on lubrication, lens hygiene and risk‑factor control.
Myths and quick answers: stroke risk, stress, exercise, flying
A subconjunctival haemorrhage looks alarming, so myths abound. Here are fast facts to set you at ease and help you act sensibly while it heals.
- Stroke risk: A one‑off red patch is not a stroke. If episodes recur, get your blood pressure checked, especially with diabetes or hypertension.
- Stress: Emotional stress isn’t a proven cause; physical straining (coughing, sneezing, vomiting, heavy lifting) can trigger a bleed.
- Exercise: Gentle activity is fine. Avoid heavy lifting/straining until the redness fades.
- Flying: Air travel is generally okay. Cabin air can dry eyes — use lubricating drops, and seek care if pain or vision changes occur.
Key takeaways
A ruptured blood vessel in the eye looks dramatic but is usually harmless and clears within a fortnight. Watch for the red flags we covered, ease irritation with lubricants and cool compresses, and avoid rubbing or heavy straining. If episodes repeat, get your blood pressure and medicines reviewed with your GP.
- Typical look: Bright, well‑defined red patch; vision normal.
- Heals itself: Most clear in 1–2 weeks; longer on blood thinners.
- Urgent signs: Pain, light sensitivity, vision change or recent injury.
- Higher risk: Hypertension, diabetes, anticoagulants, contact lenses, older age.
- Prevention: Lubricate, protect eyes, limit straining, maintain health checks.
If you’re worried or the redness keeps returning, book a review with our team in Randwick: Bright Sight Eye Specialists.