סימן פ סעיף לא
בְּתוּלָה, אֲסוּרָה לִקְלוֹעַ שַׂעֲרוֹתֶיהָ בַּשַׁבָּת, וְלֹא לְהַתִּיר קְלִיעָתָהּ, אֲבָל יְכוֹלָה לְתַקֵּן שַׂעֲרוֹתֶיהָ בְּיָדֶיהָ. וּבְמַסְרֵק הֶעָשׂוּי מִשְּׂעַר חֲזִיר, אִם הוּא קָשֶׁה מְאֹד שֶׁאִי אֶפְשָׁר שֶׁלֹּא יַעֲקוֹר שְׂעָרוֹת, אָסוּר לְסָרֵק בּוֹ. אֲבָל אִם אֵינוֹ קָשֶׁה, מֻתֶּרֶת לְתַקֵּן בּוֹ שַׂעֲרוֹתֶיהָ, וּמִכָּל שֶׁכֵּן אִם הִיא מְיַחֶדֶת אוֹתוֹ לְכָךְ (שג שכז).
A girl is forbidden116Shulchan Aruch 303: 26. See Masechet Shabbos 94. According to most poskim, this is a shevus. The Rabbanan prohibited this because it is similar to boneh (building). Braiding a wig is also considered weaving (one of the melachos). Since it may not be considered permanent, it is a shevus and not a deoraisa. to braid her hair on Shabbos and she must not undo117Tosafos (Maseches Shabbos 57), Shulchan Aruch 303: 26. her braids, but she may fix her hair with her hands.118Rema 303. She can also put her hair in a tiara or put a ribbon in the hair on Shabbos. Regarding combs made from hogs' hair, —If the bristles are very hard, so that it is impossible not to tear out hairs, it is forbidden to comb with it, but if it is not so hard, she is permitted to set her hair with it.119It should be special for Shabbos so it should not look like עוּבְדָא דְחוֹל (weekday melachah activity). (Peri Megadim, Mishnah Berurah 303: 87) 120The wording is somewhat unclear. The halachah is, that even a soft brush is permitted only to flatten down the hair a little, but it is forbidden to comb or brush, even with a soft brush. It is forbidden to do anything to your hair with a hard brush. See Shulchan Aruch 303: 27, Mishnah Berurah. A wig should not be straightened with a comb, but with the fingers [Eglei Tal (Gozeiz, par. 10)]. See Rema 337: 2, Mishnah Berurah. It is preferable to be machmir. (also see Minchas Shabbos 117) And it is certainly [permitted] if it is set aside for that purpose.
תנא דבי אליהו כל השונה הלכות בכל יום מובטח לו שהוא בן העולם הבא שנאמר הליכות עולם לו אל תקרי הליכות אלא הלכות (נדה ע"ג.)