Well, it is very hard to say why you keep getting subconjunctival hemorrhage, for they are very normal to have, and they can be harmless, even no treatments are needed. For your situation, I can just give some possibility which can lead to subconjunctival hemorrhage. For example, some injury to the eyes can lead to them. In addition, sometimes they occur after a bout of coughing or vomiting. High pressure is also an essential factor. So you should not do some activities which can increase your blood pressure, or it can cause subconjunctival hemorrhage. To relieve your symptom, you can just put some cool teabags on your eyes, and then have a good rest. And they can disappear. Anyway, they are harmless.