Fasting with Kidney Stones
Question
In the past, I have had several instances of kidney stones caused by insufficient drinking. Recently, I have been feeling as if I have a stone, and only increased fluid intake seems to help. I wanted to know if I can fast. Additionally, I am asking on behalf of my wife who gave birth by cesarean section four months ago and is currently breastfeeding, if she can fast.
Answer
Shalom!
If you have a kidney stone and there is pain, do not fast. A woman who gave birth four months ago should fast. If she feels particularly weak, or if there will be a lack of milk for the baby, she should break the fast.
Source
Mishnah Berurah 554:6
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