Waking up with a bright red patch on the white of your eye can be alarming. In most cases, it is a small burst blood vessel under the conjunctiva, the clear layer covering the eye.
Common causes
- Coughing, sneezing, vomiting or straining
- Rubbing the eyes
- Lifting something heavy
- Blood-thinning medicines
- High blood pressure
- Often, no cause is found
What to expect
The patch does not affect vision and is usually painless. It may spread a little at first, then fade from red to yellow over one to two weeks, like a bruise. No treatment is needed, though lubricating drops can ease any mild scratchiness.
When to see a doctor
- It followed an injury to the eye or head
- You have pain or changes in vision
- It happens repeatedly
- You take blood thinners, or bruise or bleed easily elsewhere
- Your blood pressure has not been checked recently
Frequently asked questions
Is it contagious?
No. It is a small bleed, not an infection.
Should I stop my blood thinner?
No. Never stop prescribed medicines without talking to your doctor.
Sources
This article is for general information and does not replace an examination by an eye doctor. If you have symptoms, please book a consultation.