Depiction of wet cupping from a centuries-old German bible. Wet cupping differs from standard cupping in that prior to the cup being applied a tiny incision is made to the skin, then the cup applied with suction over the site. The result is that there will be some blood suctioned into the cup. While some clinicians today still utilize this form of cupping, I have no experience or training with it and currently have no plans to pursue it! I will refer you to a study that did show it to be beneficial for removing heavy metal toxins from the body (https://www.sciencedirect.com/science/article/pii/S2005290118300748). Source: Otto von Passau: Die 24 Alten (Bruchstücke). https://daten.digitale-sammlungen.de/~db/0006/bsb00069125/images/index.html?seite=290