The Ins and Outs of Sukkah Observance Or Attending the Ailing and the Uncomfortable

 https://rabbikaganoff.com/the-ins-and-outs-of-sukkah-observance-or-attending-the-ailing-and-the-uncomfortable/

According to most poskim, illness does not excuse someone from observing a mitzvah unless it is potentially life-threatening (see Shu’t Rashba #238 and Shulchan Aruch Orach Chayim 472:10, based on Nedarim 49b). Moderate illness exempts one only from the mitzvah of sukkah, but not other mitzvos.