Can I get my eyebrows waxed during the shloshim?
A married woman, or a woman that is looking for a shudduch that is in aveilus of shloshim may remove unwanted hairs during shloshim. Although the Rema holds not to take haircuts during shloshim, this only applies to taking a regular haircut, since women often grow their hair long. However a married woman may remove unwanted and unsightly hairs so she will look pleasant to her husband.
Hamakom yinachem eschem btoch shar aveilei tzion v’ yerushalayim.
Y:D 390-5, Chochmas Adom 165-25, Divrie Sofrim ibid ftnt. 38-39, poskim.