 [ Symptoms ] can high blood pressure cause broken vessels in the eye i was fine this morning but an hour later getting to work i have a broken blood vessel in one of my eyes and it looks terrible what cause this to happen [ Disease ] i can not see your eye but this may be a common subconjunctival hemorrhage this can be caused by coughing sneezing exercising or even straining for a bowel movement having uncontrolled high blood pressure and certain medications can be other factors but in most cases this condition is innocent    looks worse than it actually is if you are concerned you can see your medical provider or even eye care professional for a exam and consultation