Haircut within thirty days in case of distress

A mourner within thirty days who experiences great distress due to excessive hair, is it permissible to be lenient with a haircut in case of distress?

It is not permissible to be lenient with a haircut even in case of distress.

The Tur, Siman Shin Tzadik, writes: "But it is forbidden to shave either the hair of the head, the hair of the beard, or any hair on the body, even in hidden places." And the Perisha writes: "It is somewhat difficult to understand what is meant by even in hidden places, for in hidden places it is more logical to forbid, as our teacher wrote earlier in Siman Kuf Pei Bet, that the armpits and pubic area are forbidden even with scissors. (And it could be said that here it refers to a woman who is permitted to shave hidden areas as written in Siman Kuf Pei Bet. Thus far the correction) And it can be said that the Beit Yosef there (page Taf Kuf Mem Tet, D'H and M'Sh and Y'O) wrote that what is written that with scissors it is forbidden, it means scissors like a razor, but with ordinary scissors even in hidden places it is permitted. And if so, regarding mourning, it is a novelty, for certainly there is not so much pleasure in cutting hair in hidden places, but there is distress from the hair there. Or from where could it be said that shaving is forbidden, from what is written about the sons of Aaron: "Do not let your heads grow long," and one might think that only hair similar to the hair on the head which is visible, and not in hidden places. Nevertheless, it is evident from his words that even in case of distress, it is not permissible to be lenient with a haircut.