Blood coming out of one’s body while fasting

Question: What is the amount of bleeding caused by Hijaamah (cupping) which invalidates a person’s Sawm (Fast)? Does a person’s Sawm become invalid if they bleed extensively during performance of an oral surgical operation?

Answer: Hijaamah invalidates Sawm according to the correct opinion maintained by scholars. This is based on the Hadith which reads: A man who cups or gets himself cupped will have their Sawm broken. The same applies to withdrawing a large amount of blood from the fasting person. However, Sawm will continue to be valid if blood is emitted because of a surgical operation. This is because emission of blood in this case is not out of the patient’s own will... read more here.

Cupping and phlebotomy for a person observing fast

Question: Does cupping during the daytime in Ramadan invalidate the Sawm (Fast) of both the cupper and the one who is cupped? Should they break their Sawm and make up for the Sawm of the day in question at a later date? Please answer my question!

Answer:  The Sawm of the cupper and the one being cupped is invalidated by doing so. The Prophet (peace be upon him) said: The cupper and the cupped have broken their more here.