Henna tattoos last up to three weeks. The location of the henna design, the skin type and the length of time the henna paste soaked into the skin all impact the amount of time the design lasts. The stain gradually fades as skin sloughs off naturally.
Traditional henna art is usually painted on the skin of the hands, wrists, lower arms and feet. The dry skin of the hands and feet absorb the henna well. Vigorous washing and abrasive soaps can reduce the lifespan of the henna tattoo. No specific remover exists, so the tattoo is likely to last for at least a week.