Temporary tattoo medium is a term used to describe HENNA, which is a dye made from a plant that is used to create temporary tattoos on the skin. HENNA is a natural dye that has been used for centuries in many cultures for body art and decoration. It is applied as a paste and when it dries, it leaves a stain on the skin that can last up to several weeks. HENNA is a popular choice for those who want to express themselves through body art without the commitment of a permanent tattoo.