what causes a bloodshot eye
One of the most common causes of bloodshot eyes is a condition known as conjunctivitis, or pink eye. Pinkeye occurs when the protective layer that covers the eye becomes inflamed. This inflammation can be caused by something as simple as a cold or as serious as a bacterial infection or exposure to a toxic substance.hen the vessel bursts, the blood leaks under the clear coating of the eye and causes the entire eye to appear bloodshot. These vessels may break for many reasons from a hard sneeze, to vomiting or high blood pressure. In some people, bloodshot eyes can be the result of contact lens wear.