I am pleasure to answer your question. The red spot you see is most likely a small blood vessel. In medical terms, it is called a subconjuntival hemmorhage. Small blood vessels lie underneath the conjunctiva, the clear coating that covers the sclera, the white part of the eye. But most often feel no pain, irritation or light sensitivity. A subconjunctival hemmorhage can occur if a person has too much pressure on the upper part of the body or head. Pressure can be created by straining too hard while lifting something very heavy or coughing or sneezing. Straining during constipation can also cause enough pressure to burst a blood vessel in the eye. Other causes are high blood pressure, diabetes, trauma or a high dosage of blood thinners, such as aspirin. If a red spot in your eye lasts for longer than a few days, you should schedule an eye exam. Your eye doctor will try to determine the cause of the subconjunctival hemmorhage. Hope it is helpful.