What is red eye blood?

There are many reasons for red eyes, usually more common reasons are excessive use of the eyes, long-term close use of the eyes, especially to see mobile phones, overnight play games, so that the eyes are in a state of excessive fatigue, red eyes will occur congestion. In addition, the eyes occur conjunctivitis, keratitis or iridocyclitis, such as inflammation, will show red blood. In addition, a sudden increase in intraocular pressure will also cause eye congestion, showing red blood.