It is dangerous for people to use castor oil as it can lead to coma even threaten to life. Usually, it can use for application of industries as a kind of lubricant. The vitamin content of castor oil is so low for the healthful use. It may cause hemiplegia if you eat excessive. Please avoid it to contact with skin and eyes. As the puffy eyes, there have some other method to treat it, is use a towel which soaked full of cool water then apply it to your eyes, doing massage around your eye socket and your temple as well as your eyebrow. If possible, you can make up, the blemish balm cream adopt around your eyes will be helpful in a short time.