A subconjunctival hemorrhage (sub-kun-JUNK-tih-vul HEM-uh-ruj) occurs when a tiny blood vessel breaks just underneath the clear surface of your eye (conjunctiva).
You may not realize you have a subconjunctival hemorrhage until you look in the mirror and find the white part of your eye is bright red.
The conjunctiva can’t absorb the blood very quickly, so the blood is trapped under this transparent surface. A subconjunctival hemorrhage may worry you, but it’s usually a harmless condition that disappears within one or two weeks.
Subconjunctival hemorrhage often occurs without any obvious harm to your eye, or it may be the result of a strong sneeze or cough that caused a blood vessel to break. You don’t need any specific treatment for a subconjunctival hemorrhage.
The cause of subconjunctival hemorrhage isn’t always known. However, the following actions may cause a small blood vessel to rupture in your eye:
- Violent coughing
- Powerful sneezing
- Heavy lifting
In some cases, subconjunctival hemorrhage may result from an eye injury, such as from:
- Roughly rubbing your eye
- Severe eye infection
- Trauma, such as a foreign object injuring your eye
The most obvious sign of a subconjunctival hemorrhage is a bright red patch on the white (sclera) of your eye.
Despite its bloody appearance, a subconjunctival hemorrhage should cause no change in your vision, no discharge from your eye and no pain. Your only discomfort may be a scratchy feeling on the surface of your eye.
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If you have recurrent subconjunctival hemorrhages or other bleeding, talk to your doctor.