Is it permissible to get an eyebrow waxing in the 9 days?
It is controversial if a woman may have her eyebrows waxed. Some poskim say that it is permitted because it may be unsightly to her husband and will cause distaste, while others say that it will not really make a difference. Therefore it will depend on the situation, if it is needed then it is permitted, but if it isn’t needed for the above reason then it should wait until after T’ bav.
Igros Moshe Y:D 2-137, Mesoras Moshe 1 O:CH 367(6), Emes L’yackov ftnt. 512, Kovetz Halachos (Bein Hamitzarim 6 (2-4 ftnt. 4, R’ Y. Cahen shlit”a, Nitei Gavriel (Bein hamitzarim) 19-6, Halichos Shlomo 14 ftnt. 9, that pulling out hairs is not considered cutting hair.