There are even DIY kits at your local drug store.

Because of thetemporary stainit leaves on the skin, people began using henna paste for decorative purposes.

Now it is used to symbolize prosperity and protection, and can often be seen at celebratory occasions.

Two hands held palm out covered in an intricate design made with henna paste

After letting the paste dry for a full day, it’s removed to reveal a reddish stain.

Traditional henna is safe for most people to use on their skin without any problems.

So what happens if the paste that’s being used to stain your skin is black instead?

Person drawing mehndi on the back of another person’s hand

So why are henna tattoos causing problems all of the sudden?

The difference between traditional henna and the newer black henna is an ingredient called p-phenylenediamine (PPD).

This coal-tar hair dye ingredient is used to make the henna ink darker.