Red eyes can be a sign of a liver disease known as cirrhosis. If you are suffering from the alcoholic liver disease, you have to give up drinking alcohol. Otherwise, you have to risk your life. Once you stop drinking, the red eyes can disappear on themselves as the liver starts to heal itself gradually. Also, red eyes can be caused by infections, trauma or eye diseases such as conjunctivitis, glaucoma, subconjunctival hemorrhage, common cold, corneal scratches. Coughing, sneezing, crying, and lack of sleep can lead to redness in the eyes as well.