סימן צא סעיף א
מִי שֶׁיֵּשׁ לוֹ מֵחוּשׁ בְּעָלְמָא וְהוּא מִתְחַזֵּק וְהוֹלֵךְ כְּמוֹ בָרִיא, אָסוּר לַעֲשׂוֹת לוֹ שׁוּם רְפוּאָה, אֲפִלּוּ בְּדָבָר שֶׁאֵין בּוֹ מִשּׁוּם מְלָאכָה, וַאֲפִלּוּ לָסוּךְ בְּשֶּׁמֶן, בֵּין בְּעַצְמוֹ בֵּין עַל יְדֵי אֲחֵרִים, וַאֲפִלּוּ עַל יְדֵי אֵינוֹ יְהוּדִי.
One who is slightly ill and makes an effort [and manages] to get around like a well person, is forbidden to be medically treated in any way, even in a way that no melachah is involved.1The Sages prohibited taking cures lest one come to grind medicines. Grinding is one of the thirty nine major melachos (prohibited labors). This prohibition applies only to things done exclusively by and for the sick. Thus, walking for health reasons would be permitted since it is also done by persons who are well. [This applies] even to applying oil,2If this is done only by and for the sick. See footnote 1. [Rema 327: 1; Mishnah Berurah ibid.] whether this is done by himself or by someone else or even by a non-Jew.3A non-Jew may be asked to do even a melachah d’oraisa for one who is ill enough to be confined to bed. [Rambam; Mishnah Berurah 326: 46] For one who is less ill, some permit asking a non-Jew to do a melachah d’rabanan. [Magein Avraham 328: 12; Shulchan Aruch Harav, etc.] Others prohibit this. [Chayei Adam 69: 1]
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.)