A burst blood vessel in they eye can be dangerous if it does not heal and go away within 2 to 3 weeks or you notice more blood in your eye.
Although the good news is that burst blood vessels in your eye are not usually serious or dangerous.
Call your doctor if the blood doesn't go away in 2 or 3 weeks, if you also have pain or vision problems, if you have more than one subconjunctival hemorrhage, or if the blood is anywhere inside the colored part of your eye (iris).
A subconjunctival hemorrhage often occurs without any obvious harm to your eye.
Even a strong sneeze or cough can cause a blood vessel to break in the eye.
You don't need to treat it.
A subconjunctival hemorrhage may look alarming, but it's usually a harmless condition that disappears within two weeks or so.
The time it takes for a subconjunctival hemorrhage which is a burst blood vessel in the eye to heal is between seven to ten days.
If the burst blood vessel or subconjunctival hemorrhage hasn't healed within 10 days then you should go to urgent care or the emergency room to make sure it's nothing more serious.
But most cases of burst blood vessels in the eye heal on their own within one week to 10 days without any medical treatment.
Although a burst blood vessel in the eye can sometimes seem serious they are mostly not serious enough to warrant any medical treatment.
The last time I had a burst blood vessel in my eye it went away within 7 days on it's own.