The sick Person upon whom fasting is too difficult
Question :
I am a woman who is ill and I did not fast some days last Ramadhan. I am not able to make up for these days due to my illness. So, what is the expiation for that? Likewise, I will definitely not be able to fast Ramadhan this year, so what is the expiation of that also? May Allah reward you with good.
Answer:
It is legislated for the sick person upon whom fasting is too difficult to break his fast, and whenever Allâh cures him, he makes up for whatever is due upon him of fasting. This is due to Allâh's Statement:
"And whoever is ill or on a journey, then (he may fast the days from) a number of other days."
O you questioner, there is no sin upon you in breaking your fast during this month (Ramadhan) as long as the illness still remains. This is because breaking the fast is a concession from Allâh for the sick person and the traveller, and Allâh loves for His concessions to be taken just like He hates for disobedience of Him to be done. There is no expiation on you, but whenever Allâh cures you, you must make up for the days. May Allâh cure you from every evil and expiate the sins from you and us.
Source:
Ash-Shaykh Ibn Baz
Fatawa Islamiyah, Vol. 3 Page 282