There are many factors that cause burst blood vessels in eye, and you may be surprised to hear some of them. Here is a list of some common causes of broken blood vessels in eye:
1) Violent sneezing, coughing, or vomiting. Burst blood vessels in eyes are often caused by coughing or sneezing with force. The strain associated with severe vomiting could also be one of the causes of this problem.
2) Strenuous activity. If you do some heavy lifting, it may cause the blood vessels in your eyes to burst due to increased pressure after exertion. Since you exert substantial pressure on the veins located in your head, it is easy to rupture the blood vessels in your eyes.
3) Trauma to the eyes. If you cause excessive strain to the eyes or if you suffer some kind of trauma to the eyes, it could well be one of the causes of broken blood vessels in eye.
4) Contact lenses. Sometimes contact lenses irritate the eyes, especially if you rub your eyes with the lenses in them. This could easily cause blood vessels to rupture.
5) Sudden rise in blood pressure. This could happen without injury of any kind – it might just be the result of rubbing the eye too vigorously, which creates pressure in the veins. This is a mild trauma to the eyes, and it could cause the blood capillaries to burst.
6) Pink eye. If the burst blood vessels are accompanies by redness, irritation, and itchiness; then it is probably pink eye. In this case you should definitely see a doctor because pink eye is contagious.
7) Hypertension and stress. If you are prone to high blood pressure in general and if you spend a lot of time under stress, it could be one of the causes of burst blood vessels in eye. Also, if you are taking blood thinning medications or any other medications affecting the blood stream, they may also be responsible for the ruptured blood vessels. Even aspirin in high doses can have a similar effect.
8) Eye infections. Conjunctivitis is an example of this, and it could be responsible for broken blood vessels in your eyes.
9) Eye surgery. If you’ve had eye surgery or anything done to the eyelids, it could also be affecting the blood vessels in your eyes and cause an infection.
10) Diabetes or rare blood clotting. These are not common, but it is possible for the blood vessels in your eye to rupture as a result.