White petroleum jelly for the treatment of skin cracks effective, considered skin care, can also be used as a lubricant role, coated on is not a big problem, but this contains chemical reagents, or less use is better. Medical petroleum jelly contains industrial raw materials, massage the skin with it to absorb the industrial materials, not good for the body. Vaseline has the effect of stopping bleeding, minor burns can also be coated with Vaseline to ease the pain, people who have small children at home can apply Vaseline on the buttocks of small children to prevent diaper rash. Vaseline can also be applied to the thermometer to lubricate it before taking the anal temperature of a small baby to reduce discomfort.