I WOULD LIKE TO KNOW IF THERE IS ANY GENUINE HADITH ON THE USE OF HENNA FOR WOMEN. I READ IN A BOOK CALLED SUNAATS THAT THE PROPHET (S.A.W) INSISTED THAT WOMEN WEAR HENNA ON THIER HANDS, WHAT ABOUT WEARING HENNA ON THE FEET.
Hazrath Ayesha (Radhiallaahu Anha) narrates that Hinda, the daughter of Utbah said, Oh Prophet of Allah, grant me Bai'at (allegiance). Rasulullah (Sallallaahu Alayhi Wasallam) replied, I will not grant you Bai at until you change your palms (apply mehndi) - (Mishkat pg.383 -Rahimiya)
Hazrat Ayesha (Radhiallaahu Anha) states that a woman behind a curtain presented a letter to Rasulullah (Rasulullah (Sallallaahu Alayhi Wasallam). Rasulullah (Sallallaahu Alayhi Wasallam) withdrew his hand saying I do not know if this is a males hand or females hand, the woman replied, Rasulullah ((Sallallaahu Alayhi Wasallam) said, 'If you were a female you would have changed your nails, (by applying mehndi)' - (Ibid)
In view of the above quoted hadith one of the reasons for females applying mehndi is to distinguish her hands from that of a male. That can be best achieved by applying mehndi on the palms and the nails. That can also be achieved by applying mehndi on only the palms or only on the nails.
It is recommended for women to apply Henna but to establish functions like the customary Henna party before weddings is a hindu tradition and non-Islamic in which many Haraams such as music and free mixing of the two genders takes place. This is not permissible.
Also, a woman shouldn't go about displaying herself once she has applied Henna. and Allah Ta'ala Knows Best