Praise be to Allah.
The cupper and the one to whom cupping is done both break their fast; they have to refrain from eating etc for the rest of that day, and they have to make up that day later on, because the Prophet (peace and blessings of Allah be upon him) said: “The cupper and the one to whom cupping is done both break their fast.”
Narrated by Abu Dawood, 2367; Ibn Maajah, 1676. Classed as saheeh by al-Albani in Saheeh Abi Dawood, 2074.
And Allah is the source of strength. May Allah send blessings and peace upon our Prophet Muhammad and upon his family and companions.