Subconjunctival Hemorrhage: What It Is and When to See a Doctor

You look in the mirror and see a bright red patch on the white of your eye. It does not hurt, and you are wondering whether something serious has happened. If you are living or travelling in Spain, the question feels harder when you are not yet sure how the health system works. The reassuring news is that a subconjunctival hemorrhage is usually harmless.

What a subconjunctival hemorrhage is

A small blood vessel breaks just under the conjunctiva, the clear membrane that covers the white of the eye. The blood becomes trapped under that layer and looks like a sharply outlined, bright red area. It usually appears suddenly, without pain, and does not usually affect eyesight.

Why it happens

Often there is no clear trigger. Common ones include:

• Sneezing, coughing, straining or vomiting.
• Rubbing the eye or inserting contact lenses.
• A minor bump to the head or eye.
• A recent eye infection (conjunctivitis), which can weaken small blood vessels.
• Blood-thinning medication, which makes any bleeding more visible.

What to expect

The patch may look larger during the first 24 hours, then fade gradually, much like a bruise. In most people it clears within one to two weeks. You can usually carry on with your normal activities. If the eye feels irritated, artificial tears can help, and it is best not to rub it.

When to see a doctor

Ask for a medical assessment if:

• You have eye pain.
• Your vision changes: blurry, double or difficult to see.
• You had a recent injury to the head or eye.
• Both eyes are affected at the same time, or you notice easy bruising or bleeding gums.
• You have a bleeding disorder or high blood pressure.
• It does not improve within two weeks, or it keeps coming back.

Severe eye pain, sudden vision loss or an injury to the eye needs urgent in-person care at an eye emergency department. For any emergency, call 112.

How an online consultation can help

A video consultation with a licensed GP in Spain lets you go through your symptoms, medical history and medications calmly, in English or Spanish. Where clinically appropriate, following a genuine evaluation, the doctor can advise whether you need an in-person eye examination. If the red eye comes with discharge, itching or crusting, our guide to pink eye treatment in Spain explains the differences. This service is for urgent, non-emergency care and is available only to patients physically in Spain. You can book a video consultation when you are ready.