What is a henna tattoo?

According to Wikipedia, in English, there are no useful words to describe a henna stain ornamenting the skin, so henna designs are frequently called “henna tattoos”. Hennaed skin is not tattooed. Unlike a tattoo, henna only dyes the outermost layers of the skin. No needles are used. Henna is painted onto the surface of the skin. Having henna applied feels like having your skin decorated with pudding. The process is relaxing and pleasant. It is a little wet and cold – so an October henna at Unity will be most enjoyable!