The lower eyelids are not necessarily related to bad kidneys. Most of the lower eyelids are blue because the skin and muscle tissue of the lower eyelids are relatively thin and the veins under them are more visible. Because the veins have non-oxygenated hemoglobin, they are black in color, so in appearance, the lower eyelids are darker. If the kidney function is bad can cause puffy eyelids and dark face, eyelid puffiness are all symmetrical in both eyes, and bad kidney function are all caused by various habits or diseases later in life. If the lower eyelids are blue most of them are hereditary, and a small part of them may be the temporary greening of the eyelids caused by excessive late nights and fatigue, so the lower eyelids are blue and bad kidney function are not necessarily related.