Woman
    exciting herself to the point of climax
Question

                I wanted to know if a woman can excite
      herself till she comes. Does this make her unclean the way intercourse does?
Praise be to Allah.If a woman excites herself to the point of climax, it is
    obligatory (waajib) for her to do ghusl, and she is considered to be junub (in a state of
    sexual impurity) because of that. The Prophet 
 (peace and blessings of Allaah be upon him)
    said: “Water is for water” (Saheeh Muslim, 151), i.e., ghusl becomes waajib when
    fluid is emitted as a result of sexual stimulation.
But this action – when a person excites herself or himself to the
    point of climax – is masturbation, which is forbidden for men and women alike. There
    is no differentiation between them in this regard. For more information and explanation of
    the evidence (daleel), please see Question #329.
And Allaah knows best.