There are various blood removal method, one of method that I’ve seen and commonly used is Hijamaz/Bekam. A small incision is made on the skin (usually the back)

There are various blood removal method, one of method that I’ve seen and commonly used is Hijamaz/Bekam. A small incision is made on the skin (usually the back); then a suction cup is used to draw the blood out. It is widely popular in Asia, I usually see it done by Moslem as they are recommended by their prophet to do so. Make sure the method is correct and that the equipment is sterile though.