Shaykh Abdul-Muhsin Al-Abbaad was asked:
“Is using henna specifically for married women? Is this correct?
“This is not correct as is well known. No doubt women who are married have a need to beautify themselves for their husbands and there is no harm in training the young girls to wear henna. It is not a condition that beautification is only for husbands. Rather a woman can beautify using henna and use henna even if she is not married, as long as it does not lead to harm or fitnah. This is because this (henna) is from the affairs of the women”. [Sharh Sunan Abi Dawood no. 468]
Faisal Ibn Abdul Qaadir Ibn Hassan