I would talk to your doctor first before applying something intended for oral use on your
skin. Usually creams or other
products designed to be absorbed through the skin need special chemicals to help them get through the skin barrier (water doesn't penetrate the skin, nor do most soaps, lotions, or other things you usually put on your skin. Skin is designed to keep out foreign invaders, such as viruses and bacteria, so it isn't easy for most things to be absorbed).