4. Recommended for one who is ill and fears harm from fasting.
When one gets sick while fasting could cause harm to one’s health then it is recommended for the person to break his/hers fast. Sickness or illness is unpredictable, when Allah wills that he/she gets an illness then he/she will get it. So if the fast is a cause for one’s health to degenerate then it is recommended for him/her to break his/hers fast and make it up at a later time. One can’t just wake up and attempt a fake cough and say “Oh well I’m sick and I can’t fast I guess I’m eating all I want to eat.” It is when the sickness or illness is a hardship for a person, it is better for him to break his fast and make it up later. And in the end a person’s sincerity is only known by Allah alone.
Related Posts:
Prologue
Introduction
Chapter 1: Fasting in Ramadhaan
Chapter 2: Conditions in which breaking fast is Permissible, Impermissible, or Recommended
1. Impermissible to break fast during Ramadhan
2. Prohibited to fast for a woman in her menstrual or post-partum bleedin
3. Obligatory to break it when it is required to save a person’s life
4. Recommended to break fast for one who is ill and fears harm from fasting.
5. Recommended to break fast when one is traveling
6. Permissible for one to break fast who begins a journey while fasting
7. Permissible for a pregnant or nursing (breast feeding) woman
8. Change of condition of a person doesn’t obligate one to refrain from eating and drinking the rest of the day.
9. Prohibited to fast a voluntary fast instead of an obligatory one.
Chapter 3: That which Invalidates Your Fast
Chapter 4: Repayment of Missed or Broken Fasts
Chapter 5: Recommended, Disliked, and Impermissible Days of Fasting
(Chapter 4 & 5 – Insha’Allah comming soon around Eid al Fitr)
IBN AL HYDERABADEE 
id disagree muslim people should be concerned for their health
can a woman break her fast while at her pregnancy?