Does kidney dialysis affect fasting?

The first type of illness is that disease which has spread among many Muslims, and we ask Allah for their well-being, which is kidney failure. A person afflicted with this disease requires dialysis, and the dialysis may take place during the day in Ramadan. Many of those afflicted with this disease ask: if the doctors permit them to fast, does kidney dialysis affect the fast or not?
Answer: Illnesses vary, and patients know their own conditions best. So, for any illness that makes fasting difficult and affects the patient by increasing the illness or delaying recovery, it is permissible for him to break his fast. Therefore, the dialysis performed for kidney patients, if this dialysis affects him if he fasts, then he may break his fast and there is no blame on him.
As for the dialysis itself, in that it involves administering a substance from which something harmful is expelled and something beneficial is retained, I do not know of anything that prevents this if it is like injections, such as the needles given to a person to preserve health or to suppress an illness like fever, or to expel bad blood from the mouth or the rear passage. This is not considered a breaker of the fast in this case; because he did not intend it, rather it is from the side of treatment by which his health is preserved. So, he is given this to preserve his health and safety from destruction and what follows from the treatment of the needles he is given, which is the exit of something and the entry of something. So, something good is entered into him and what harms him by remaining is expelled from him. This is what comes to mind, as far as we know, regarding their practice in dialysis. And if his fasting in this state harms him by delaying the illness, prolonging his lifespan, or increasing it, then he breaks his fast and undergoes this procedure while being in a state of having broken his fast, and there is no need for the fasting that harms him. And Allah is more merciful, Glorified and Exalted is He, and He is the One who said: : [al-Baqarah:185]. This is what comes to mind in this issue. And if he makes up the fast afterwards as a precaution to expel what is expelled from him, we do not know of any harm in that. As for what appears, and Allah knows best, it is that in this state it is similar to what the Prophet (peace and blessings be upon him) said about: ; because if he leaves off the procedure, the leaving it off harms him. And if he is given these needles by which his health is preserved, this thing exits from him, just as it may exit from the lower passage, in that he is given substances that cause him to suffer from diarrhea and the exit of what harms him from below. So, likewise, the exit of what harms him from above, by way of vomiting, bleeding, the expulsion of blood, or the like, or its exit from below for the sake of treatment, does not harm him, if Allah wills. Yes.
The presenter: May Allah reward you.