Mullah Ali Qari (R.A) has commentated that plucking of the facial hair is haraam (prohibited) for a woman with the exception of moustache or beard hairs, if any woman is unfortunate enough to be troubled by these. (Mirqaat Vol.8 Pg.295; Ashrafiyyah).
However, if the eyebrows have become so dense that it is unseemly for a woman and incites abhorrence in her husband, it is permissible to trim it to a more appropriate and normal size. (Ahsanul Fataawa Vol.8 pg.76; Zakariyya Book Depot)
This means that in general circumstances it will not be permissible, nor plucking, nor bleaching.
