Answer
In the Name of Allah, Most Gracious, Most Merciful.
All praise and thanks are due to Allah, and peace and blessings be upon His Messenger.
In this fatwa:
If a Muslim is temporarily ill, it is permissible for him to refrain from fasting and he must make up the days on which he broke his fast upon regaining his health.
Answering your question, Dar Al-Ifta Al-Missriyyah, states:
Fasting is one of the obligations of Islam that Allah based on ability. If a Muslim is unable to fast, it is permissible for him to refrain from it based on the legal dispensation. Rather, it is obligatory to refrain from fasting if specialized physicians advised that fasting will harm the patient’s health.
If a Muslim is temporarily ill, he must make up the days on which he broke his fast upon regaining his health.
If he suffers a chronic disease where there is no hope to recover, he does not have to make up the missed days. Rather, in this case he must compensate for it by feeding a poor person for each day he missed according to his financial ability.
It is permissible to pay the value of the meal in cash. If this person is poor or his income hardly suffices him and his dependents, he is not to compensate for refraining from fasting.
May Allah grant you speedy recovery.
Almighty Allah knows best.