1 – Sickness
Sickness means everything that means that a person is not healthy.
Ibn Qudaamah said: the scholars are agreed that it is permissible for the sick person not to fast in general. The basis of that is the aayah in which Allaah says (interpretation of the meaning):
“but if any of you is ill or on a journey, the same number (should be made up) from other days”[al-Baqarah 2:184]
It was narrated that Salamah ibn al-Akwa’ (may Allaah be pleased with him) said: “When this aayah was revealed – ‘And as for those who can fast with difficulty, (e.g. an old man), they have (a choice either to fast or) to feed a Miskeen (poor person) (for every day)’ [al-Baqarah 2:184 – interpretation of the meaning] – those who wanted not to fast could do that, and pay the fidyah (i.e., feed one poor person for each day). That remained the case until the following aayah was revealed, i.e., the verse:
‘And as for those who can fast with difficulty, (e.g. an old man), they have (a choice either to fast or) to feed a Miskeen (poor person) (for every day)’
[al-Baqarah 2:185 – interpretation of the meaning] – so it abrogated it.”
The sick person who fears that fasting may make his sickness worse or that it will slow down his recovery or damage a part of his body, has the option of not fasting, and indeed it is Sunnah for him not to fast and it is makrooh for him to complete his fast, because that may lead to his death. So he has to be cautious and protect himself. Moreover, if the sick person is very ill, that makes it permissible for him not to fast. But if a healthy person fears difficulty or tiredness, it is not permissible for him to break his fast, if all that happens to him when he fasts is that he becomes tired.