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
  • Vomiting

In some cases, subconjunctival hemorrhage may result from an eye injury, such as from:

  • Roughly rubbing your eye
  • Severe eye infection
  • Trauma, such as a foreign object injuring your eye
Jan. 22, 2014