A single bloodshot eye typically results from a localized issue like irritation, dryness, or a minor injury. Most cases clear within hours or days, but persistent redness may indicate a more serious condition requiring medical attention.
The most frequent cause is a subconjunctival hemorrhage: a small burst blood vessel in the white part of the eye. This often happens without pain or vision changes. Other common triggers include:
Less common causes include corneal abrasions, glaucoma, or inflammatory conditions like uveitis.
Consult an eye doctor if redness persists beyond two days, worsens, or appears with:
These may signal serious conditions like acute angle-closure glaucoma or corneal ulcers.
Most cases resolve without treatment. For relief:
Antibiotic drops treat bacterial infections, while antiviral medications address viral causes.
Reduce risk through these habits: