Is the purpose of cupping to reduce the blood or to draw out all the corrupt blood? A question from the Shaykh to one of the cupping specialists!!

The Shaykh : Is the purpose of cupping to reduce the blood and not to draw out the corrupt blood?
The student : The purpose of cupping is not to reduce the blood, but rather to draw out the corrupt blood.

The Shaykh: All right.
The student : Perhaps I would say both together.

The Shaykh : Fine, what is the sign of corrupt blood as opposed to healthy blood?
The student : The sign of corrupt blood as opposed to healthy blood is that the corrupt blood coagulates, while healthy blood does not coagulate. This is, of course, based on experience and prior to that experience, based on questions I asked some scholars of modern medicine. They said that corrupt blood coagulates and non-corrupt blood does not coagulate. This has happened to me; sometimes in the cup, some of the blood comes out black, and some of it does not coagulate while the rest does coagulate. Yes.

The Shaykh : Okay, does it coagulate immediately?
The student : Immediately.

The Shaykh : Immediately!
The student : It comes out and coagulates immediately, becoming solid like the liver, and sometimes even more solid.

The Shaykh: Yes.
The student : To the point that some of them, I mean, on Thursday I had a woman whom I was cupping on her knee, and something like white pus, not blood, would come out of her knee. She would have blood and something like bubbles coming out, and from the other side, blood would come out from one side and something like pus from the other side, exactly. So, the rest of the blood would coagulate quickly and freeze, except for a small amount.

The Shaykh : Good, if Allah wills, rely on Allah.
The student : If you wish, I will cup you with this cup.