Blood in Your Eye? Subconjunctival Hemorrhage: Medically Approved Next Steps

Seeing blood in your eye can be alarming. The good news is that in most cases, it's something called a subconjunctival hemorrhage, and it's usually harmless.

A subconjunctival hemorrhage happens when a tiny blood vessel breaks just under the clear surface of your eye (the conjunctiva). Because this layer is transparent, the trapped blood looks bright red. It can appear suddenly and often looks worse than it feels.

Here's what you need to know — and what to do next.

---

What Is a Subconjunctival Hemorrhage?

A subconjunctival hemorrhage is bleeding under the conjunctiva, the thin, clear membrane covering the white part of your eye (the sclera).

Unlike bleeding inside the eye (which can threaten vision), this type of bleeding:

• Happens on the surface
• Does not affect your vision
• Usually causes little to no pain
• Often clears up on its own within 1–2 weeks

It may look dramatic — like a bright red patch or even a solid red area — but most cases are mild and self-limited.

---

What Causes a Subconjunctival Hemorrhage?

In many cases, there is no clear cause. The tiny blood vessels in your eye are fragile and can break easily.

Common triggers include:

• Coughing or sneezing hard
• Vomiting
• Straining during bowel movements
• Heavy lifting
• Rubbing your eyes
• Minor eye injury
• Contact lens use
• Sudden spikes in blood pressure

Medical conditions that increase risk include:

• High blood pressure
• Diabetes
• Blood clotting disorders
• Use of blood thinners (such as aspirin, warfarin, or other anticoagulants)

In older adults, blood vessels become more delicate, making subconjunctival hemorrhage more common.

---

What Does It Feel Like?

Most people with a subconjunctival hemorrhage:

• Notice a red patch in the mirror
• Feel little to no discomfort
• Have normal vision
• Do not have discharge

You might feel mild irritation or a scratchy sensation, but significant pain is not typical.

---

When Is It an Emergency?

While most cases are harmless, certain symptoms require urgent medical care.

Seek immediate medical attention if you have:

• Eye pain
• Vision changes (blurry vision, double vision, loss of vision)
• Light sensitivity
• Blood inside the colored part of the eye
• Recent eye trauma
• Recurrent bleeding
• Head injury
• Severe headache with the red eye
• Bleeding in multiple areas of the body

These signs could indicate a more serious problem, such as internal eye bleeding, glaucoma, or trauma-related injury.

If anything feels severe or unusual, speak to a doctor right away.

---

Medically Approved Next Steps

If your symptoms match a typical subconjunctival hemorrhage (no pain, no vision changes), here's what experts recommend:

1. Don't Panic

A subconjunctival hemorrhage often looks worse than it is. Most cases resolve without treatment.

2. Monitor Your Symptoms

Keep an eye on:

• Changes in size
• Development of pain
• Vision changes
• Recurrence

The red area may darken before it fades — this is normal. Just like a bruise on your skin, it may turn yellowish before clearing.

3. Use Artificial Tears

If your eye feels irritated:

• Use preservative-free artificial tears
• Apply 3–4 times daily as needed

This won't speed healing but can reduce discomfort.

4. Avoid Rubbing Your Eye

Rubbing can worsen irritation and may delay healing.

5. Check Your Blood Pressure

High blood pressure is a common contributor. If you have hypertension, ensure it's well controlled.

6. Review Medications

If you take blood thinners or aspirin, do not stop them without speaking to your doctor. But do inform your healthcare provider if:

• Bleeding happens repeatedly
• The bleeding is extensive
• You bruise easily elsewhere

---

How Long Does It Take to Heal?

Most subconjunctival hemorrhages clear within:

• 1–2 weeks
• Occasionally up to 3 weeks

There is no proven way to speed up recovery. The body simply reabsorbs the blood over time.

---

When Should You See a Doctor?

Even if symptoms seem mild, schedule a medical evaluation if:

• This is your first episode and you're unsure
• It happens repeatedly
• You have underlying health conditions
• You take blood thinners
• You have high blood pressure that is not controlled
• The hemorrhage does not improve after two weeks

A doctor may:

• Check your blood pressure
• Review medications
• Evaluate for clotting issues
• Examine the eye more closely

---

Could It Be Something Else?

Not all red eyes are subconjunctival hemorrhages.

Other causes of red eye include:

• Conjunctivitis (pink eye)
• Corneal injury
• Uveitis
• Glaucoma
• Internal eye bleeding (hyphema)

These conditions often involve:

• Pain
• Discharge
• Vision changes
• Light sensitivity

If you're experiencing these symptoms or feel uncertain about what's causing your red eye, using a free AI-powered symptom checker for blood vessels broken in eyes can help you understand your condition and determine whether you need immediate medical attention.

However, online tools do not replace professional medical advice.

---

Can You Prevent a Subconjunctival Hemorrhage?

You can't always prevent one, but you can reduce risk by:

• Managing high blood pressure
• Controlling diabetes
• Avoiding heavy straining
• Treating chronic cough
• Being gentle with contact lenses
• Avoiding aggressive eye rubbing
• Wearing protective eyewear during risky activities

If episodes are frequent, your doctor may recommend blood tests to rule out clotting disorders.

---

Is It Dangerous?

In most cases, a subconjunctival hemorrhage is not dangerous and does not threaten vision.

However:

• Recurrent bleeding may signal an underlying health issue.
• Trauma-related bleeding may be more serious.
• Associated pain or vision loss always requires urgent evaluation.

It's important not to ignore warning signs.

---

Key Takeaways

• A subconjunctival hemorrhage is bleeding under the clear surface of the eye.
• It often looks dramatic but is usually harmless.
• Vision should remain normal.
• Most cases resolve in 1–2 weeks without treatment.
• Pain, vision changes, or trauma require urgent care.
• Recurrent cases should be medically evaluated.

---

When in Doubt, Speak to a Doctor

While most subconjunctival hemorrhages are mild, any eye issue deserves attention if symptoms worsen or don't follow the typical pattern.

If you experience:

• Vision changes
• Severe pain
• Head injury
• Recurrent bleeding
• Signs of a more serious medical condition

Speak to a doctor immediately. Eye health is too important to delay care when something feels wrong.

A red eye can be startling — but in many cases, it's simply your body healing a small, surface-level broken blood vessel. Stay calm, monitor symptoms, and seek care when needed.