The eyes look sunken and black? This is why!

The eyes look sunken and black? This is why! - Lack of sleep is not a trivial matter that can be ignored. Sunken eyes indicate that you do not sleep well for a period of time. And trouble sleeping can cause a variety of health problems such as memory loss, high blood pressure and even diabetes. Before it's too late, here are four medical cause why the eyes appear sunken, as reported Boldsky.1.