Narrated Aisha, Ummul Mu’minin:
A woman made a sign from behind a curtain to indicate that she had a letter for the Apostle of Allah (peace be upon him).
The Prophet (peace be upon him) closed his hand, saying: I do not know this is a man’s or a woman’s hand.
She said: No, a woman.
He said: If you were a woman, you would make a difference to your nails, meaning with henna.
— Sunan Abu-Dawud: Book 33, Number 4154
If someone were to see only your hands, would they know you were female? Why or Why not? And, most important, what are you going to do about it?
The next time you are out, stop by a Muslim market and get a bag of henna for yourself. The design need not be elaborate.
Some of my muslim sisters from east Africa only henna their fingers from just above the first finger joint down to the finger tip. It looks great masha’Allah!
If you are not good at applying henna on yourself, ask a friend or pay someone.