CausesBy Mayo Clinic staff
The cause of subconjunctival hemorrhage is usually unknown. However, the following actions may be enough to 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:
- Roughly rubbing your eye
- Severe eye infection
- Eye or eyelid surgery
- Subconjunctival hemorrhage. American Academy of Ophthalmology. http://www.aao.org/eyesmart/diseases/subconjunctival-hemorrhage.cfm. Accessed Nov. 21, 2010.
- Other conjunctival disorders. The Merck Manuals: The Merck Manual for Healthcare Professionals. http://www.merckmanuals.com/professional/sec09/ch101/ch101d.html. Accessed Nov. 21, 2010.
- Ahmed RM, et al. Diagnosis and management of the acute red eye. American Journal of Medicine. 2008;26:35.
- Robertson DM (expert opinion). Mayo Clinic, Rochester, Minn. Nov. 27, 2010.