Coughing or eye strain could also cause a subconjunctival hemorrhage. When you get a subconjunctival hemorrhage, it means that a small blood vessel breaks right under the clear eye surface.
If you get a subconjunctival hemorrhage, you may have a bright red blood patch on the white part of your eye. While it may look serious, it typically goes away on its own after 7 to 10 days. However, it is best to seek medical attention if you experience eye pain.
Infections could be the more serious cause of eye infections. An infection can happen in various eye structures, and the symptoms can include changes in vision, discharge, or pain.
Some infections that could cause eye redness include:
- Uveitis, which is uvea inflammation
- Corneal ulcers, which are wounds in the outer part of your eye
- Pink eye or conjunctivitis, which is the inflammation of your membrane that coats your eye
- Blepharitis, which is inflammation of the eyelash follicles
Other possible causes
- Rheumatoid arthritis
- Injury or trauma to the eye
- Marijuana use
- Eyelid styes
- Scratches on your cornea that are caused by overuse of contacts or irritants
- Bleeding problems
- Acute glaucoma, which causes a quick increase in your eye pressure and which is associated with eye pain and headache. This can lead to permanent blindness
What Could Happen if I Ignore Eye Redness?
In most cases, eye redness will not lead to any serious complications. However, if you notice any changes in your vision, it could signal bigger problems like glaucoma or uveitis.
Untreated eye redness due to eye infections could also lead to permanent eye damage. The infection can penetrate deeper into the interior parts of the eye, which could lead to very serious conditions like endophthalmitis.