Subconjunctival haemorrhage: that alarming red eye (which is almost never serious)
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Suddenly seeing a red patch in your eye can be alarming. However, in most cases it is a subconjunctival haemorrhage, a benign condition that usually disappears on its own. At Clínica Castellote, specialists in ophthalmology in Castellón, this is a frequent reason for consultation which, although striking in appearance, is rarely serious.
What is a subconjunctival haemorrhage?
A subconjunctival haemorrhage occurs when a small blood vessel breaks beneath the conjunctiva, the transparent layer covering the white of the eye. As a result, blood becomes trapped and a vivid red patch appears in the eye.
Despite how it may look, it does not usually cause pain or affect vision.
Why an eye suddenly turns red
There are many possible causes. In many cases, no clear trigger is identified. However, the most common factors are:
• Straining, such as coughing, sneezing or lifting heavy objects
• Rubbing the eyes vigorously
• Minor injuries
• High blood pressure
• Taking anticoagulants
It can also occur spontaneously, particularly in older people.
The most common symptoms
A subconjunctival haemorrhage usually has very specific characteristics. You will generally notice:
• A bright red patch in the eye
• No pain
• Normal vision
• A mild sensation of something in the eye (in some cases)
If the patch appears without any other symptoms, it is therefore usually no cause for alarm.
When you should see an ophthalmologist
Although it is normally harmless, there are situations in which you should seek advice:
• If it occurs repeatedly
• If it is accompanied by pain or loss of vision
• If you have had a blow to the eye
• If you have a clotting disorder or take anticoagulants
At Clínica Castellote, specialists in ophthalmology in Castellón, we can assess the cause and rule out any associated problems.
How long does it take to disappear?
A subconjunctival haemorrhage does not require specific treatment. The body naturally reabsorbs the blood within one to two weeks, much like a bruise on the skin.
In the meantime, the colour may change slightly before disappearing completely.
Conclusion
Although the appearance of a red eye can be striking, in most cases a subconjunctival haemorrhage is not serious. However, knowing when to seek advice is important for peace of mind.
If you have any concerns or notice changes in your eyes, we at Clínica Castellote, specialists in ophthalmology in Castellón, will be happy to help you look after your eye health.