Henna tattoos are harmless for your body parts and it can be removed easily from the body. Henna is natural vegetable dye, which is usually harmless, but there are various kinds of henna and some of them can cause strong allergic reaction. The henna tattoos are commonly available in the market because it is made from vegetable dyes and naturally grown. This dye can be available in three colors that are brown, red and green. This henna tattoo can be wears off as the theme of days. Some tattoo artists are adding chemicals in the henna dye for producing darker color. The chemical called para-phenylenediamine or PPD is legally used only in hair dye, the Food and Drug Administration state this. These tattoos are mostly wearing by the womenâ€™s on their weddings or on some festivals. So you can also ink henna tattoo on any part of your body you like.