The cause of subconjunctival hemorrhage isn't always known. However, the following actions may cause a small blood vessel to rupture in your eye:
- Violent coughing
- Powerful sneezing
- Heavy lifting
In some cases, subconjunctival hemorrhage may result from an eye injury, such as from:
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- Roughly rubbing your eye
- Severe eye infection
- Trauma, such as a foreign object injuring your eye
- What is a subconjunctival hemorrhage? American Academy of Ophthalmology. http://www.geteyesmart.org/eyesmart/diseases/subconjunctival-hemorrhage.cfm. Accessed June 18, 2013.
- Subconjunctival hemorrhage causes. American Academy of Ophthalmology. http://www.geteyesmart.org/eyesmart/diseases/subconjunctival-hemorrhage-cause.cfm. Accessed June 18, 2013.
- Subconjunctival hemorrhage treatment. American Academy of Ophthalmology. http://www.geteyesmart.org/eyesmart/diseases/subconjunctival-hemorrhage-treatment.cfm. Accessed June 18, 2013.
- Jacobs DS. Evaluation of the red eye. http://www.uptodate.com/home. Accessed June 18, 2013.
- Gardiner MF. Conjunctival injury. http://www.uptodate.com/home. Accessed June 18, 2013.
- Subconjunctival hemorrhages. The Merck Manuals: The Merck Manual for Healthcare Professionals. http://www.merckmanuals.com/professional/eye_disorders/conjunctival_and_scleral_disorders/subconjunctival_hemorrhages.html?qt=subconjunctival%20hemorrhages&alt=sh. Accessed June 19, 2013.
- Robertson DM (expert opinion). Mayo Clinic, Rochester, Minn. July 9, 2013.