Direct application of henna to the skin to create a
temporary tattoo is a process known as mehndi.
Health Canada recommends that you avoid
black henna dyes and pastes for henna tattoos that contain
para-phenylenediamine (PPD) because of the risk of an allergic reaction. Health Canada encourages everyone to
report adverse reactions to permanent and temporary tattoos to their local health unit.
The risk of developing a severe
allergic reaction to henna increases after an episode
of contact dermatitis. For that reason, it is recommended that you avoid hair
dyes containing henna if you have had a previous problem with an allergic
reaction to henna in a temporary tattoo.
Your first henna tattoo
should be in a place where you can cover it if it lasts longer than you expect.
It is not a good idea try to remove your henna tattoo; let it naturally wear
off. Be very careful not damage your skin—do not scrub or pick at your