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 Sawm.... read more here.