Puffy eyes can be caused by several reasons and do make people look inanimate and ugly. The skins under the eyes are very thin and there are a lot of blood vessels around the eyes, thus making the skin under the eyes very sensitive. If you usually sleep very late or often stay up very late at night, you will easily get puffy eyes owing due inadequate rest of your eyes. Besides, if you have a habit of drinking a lot of water before you going to bed, the water will stay in the cells of the skins under your eyes, which also will make your eyes look puffy. In addition, if your sleeping quality is not good and you just turn and toss around in the bed all night which will also lead to inadequate sleep at night, you can as well get puffy eyes. Therefore, to reduce puffy eyes, you should develop a habit of going to bed early, not after eleven o'clock p.m., and if possible, do not stay up at night. And be careful that do not drink too much water or alcohol before bedtime. You can drink a glass of milk to help you sleep soon and well at night. Last but not least, you can use some eye cream to spread on the skins under your eyes before and after bedtime which can help reduce puffy eyes.