I noticed a broken blood vessel in my left eye with some discomfort. What should I do?

Hi,

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This is called subconjunctival hemorrhage. It happens when a blood vessel bursts and gives some blood out, under the superficial layer of the eye called conjunctiva. It happens because of high pressure in the vessel like high blood pressure or coughing or constipation or holding heavy objects. The treatment usually is only by lubricant eye drops if it happens for the first time. But if it is recurrent every week or so, you should go for blood tests: PT (prothrombin time), PTT (partial thromboplastin time), INR (international normalized ratio) for blood coagulation tests. Finally, since you are coughing, so there is an obvious cause for the bleeding. I recommend to treat it with installing any lubricant eyedrops a few times a day. The eye should go back to normal in about ten days to two weeks. If not or if it happens again go to your doctor for blood tests. I hope this helps.