HENNA: WHAT?

HENNA originally is oriental... Sought first by the Atlantis of Herodotus; tried later by the Nubians; and ... Bla bla bla 😀 (History... May It Rest Perfectly In Glamòr past)

Simply, Henna is a dye prepared from the plant LAWSONIA INERMIS (The Henna Tree). It has been used since antiquity to dye skin, hair, and fingernails, as well as fabrics.

HENNA TATTOOS ( check Mehndi also):

This is a temporary body art resulting from the staining of skin from the dyes. The patterns range from simple dots, chains, crawlers, creepers, twigs..., to the most complex of intertwined lines, concentric circles, etc. It also involves more artistic silhouette images of tiny stars, flowers, hearts etc. And life images of birds, adorable insects (butterflies, bees etc), animals, humans etc. One can also get personalized letterings & images too. 

INNOVATIONS AND IMPROVEMENTS

The fashion of "Bridal Mehndi"  or henna tattoos is currently growing in complexity and elaboration, with new innovations in glitter, gilding, and fine-line work. Recent technological innovations in grinding, sifting, temperature control, and packaging henna, as well as government encouragement for henna cultivation in the orient, have improved dye content and artistic potential and embellishments (glitters, pearls, sequins, trimmings, stones {Swarovski, Dubai etc} ) for henna.

HENNA & RELIGION

Henna is temporary (3 weeks max), only skin-deep, and devoid of rituals. It's purely artistic, glamòr-intended and doesn't involve blood letting, thereby making it acceptable religiously. Call it GLAMÒR RELIGIOUSLY PERSONIFIED

CREDIT:

Paragraph 4: adapted from @wikipedia

NB:

This is just a fun-side (fun-side? Like I'm living up to my bio slogan: The fun-side of artistry) to henna description. For further (scholastic) reading, browse through @wikipedia