You must have seen black Henna around, when designed on the hand and feet, it is absolutely beautiful. However, it is not safe for use.
Don’t be tempted to get black henna because it contains a chemical called paraphenylenediamine (PPD).
When applied to the skin, it can cause chemical burns and an allergic reaction.
The signs range from discomfort, such as burning or tingling, to painful stinging, swelling, redness and blistering of the skin.
It can also lead to permanent scarring.
Here is a Black Henna Scar Image