Mehndi or
Henna is a paste that is bought in a cone shaped
tube and is made into designs for men and women. It is also derived from the Sanskrit
word mendhikā. The use of mehndi and turmeric is described in the earliest Hindu
Vedic ritual books. It was originally used for only women's palms and never for
men, but as time progressed, it is more natural for men to wear it. Haldi
(staining oneself with turmeric paste) as well as mehndi are Vedic customs,
intended to be a symbolic representation of the outer and the inner sun. Vedic
customs are centered around the idea of "awakening the inner light".
Traditional Indian designs are of representations of the sun on the palm,
which, in this context, is intended to represent the hands and feet.
For over five thousand years henna has been a symbol of good luck, health and
sensuality in the Arab world. The plant has been associated with positive vibes
and provides a link to an ancient age full of good and bad spirits, Baraka and Jnoun.
Generations of women have used a paste made primarily of dried ground henna
leaves to cover their hands and feet with designs ranging from simple blobs to
intricate geometric patterns designed to ward off evil, promote fertility and
attract good energy.

While there is some controversy over the origins of the use of henna as a
dying agent, the earliest clear evidence of henna application on the body
appears in Egyptian mummies whose hair and nails were stained with the reddish
brown tones of henna. Botanists believe the henna plant, Lawsonia inermis,
originated in Egypt and was carried regularly to India where it was used since
at least 700 AD for decorating hands and feet. Historically henna has also been
used for medicinal purposes, to dye cloth and leather as well as hair, to color
the manes of horses and other fur of other animals.
Practiced mainly in India and the Arab world, mehndi or henna is the
application of as a temporary form of skin decoration, popularized in the West
by Indian cinema and entertainment industry, the people in Nepal, Pakistan, Bangladesh
and the Maldives also use mehndi. Mehndi decorations became fashionable in the
West in the late 1990s, where they are called
henna tattoos.
Mehndi in Indian tradition is typically applied during special Hindu
weddings and Hindu festivals like Karva Chauth, Vat Purnima, Diwali, Bhai Dooj
and Teej. In Hindu festivals, many women have Henna applied to their hands and
feet and sometimes on the back of their shoulders too, as men have it applied
on their arms, legs, back, and chest. For women, it is usually drawn on the
palm, back of the hand and on feet, where the design will be clearest due to
contrast with the lighter skin on these surfaces, which naturally contain less
of the pigment melanin. Henna was originally used as a form of decoration
mainly for Hindu brides. Muslims of Indian subcontinent also apply Mendi during
their festivals like Eid-ul-Fitr and Eid-ul-Adha.

In the modern age and even due to limited supply of Indian Traditional
Mehndi artists, usually people buy ready-made Henna cones, which are ready to
use and make painting easy. However, in rural areas in India, women grind fresh
henna leaves on grinding stones with added oil, which though not as refined as
professionally prepared henna cones, achieves much darker colors.
The term
henna tattoo is figurative, because true tattoos are
permanent surgical insertions of pigments
underneath the skin, as
opposed to pigments resting on the surface as is the case with mehndi.
Likely due to the desire for a "tattoo-black" appearance, many
people have started adding the synthetic dye p-Phenylenediamine (PPD) to henna
to give it a black colour. PPD may cause severe allergic reactions and was
voted Allergen of the Year in 2006 by the American Contact Dermatitis Society.
Alata (Mahur) is a flower-based dye used to paint the feet of the brides in
some regions of India. It is still used in Bengal.