Is it permissible to break the fast during the day in Ramadan due to non-chronic cystitis that requires drinking a lot of water?

It is permissible for one who finds fasting unusually difficult, or fears an increase in illness, or has been informed by a specialized doctor of their inability to fast and their need to drink frequently during the day in Ramadan, to break their fast. They must make up the days they missed when they are able. If their inability to fast is not expected to cease, they should always break their fast and owe a fidyah for each day, which is a mudd (approximately 750 grams) of the staple food of their locality, to be given to the poor.