Discussion: Leeches are another effective detoxification technique, especially in areas of the body with external inflammation..

Medical leeches are an ancient treatment that has even received support from the medical establishment. The leeches release potent anticoagulant enzymes, and when combined with the suction of the contaminated blood around the inflammation, they stimulate blood circulation and lymph flow to the affected area, thus aiding recovery.

Link: Chinese Medicine: Cupping, Scraping, Ginger therapy, and medicinal Leeches.
https://www.sf-healing.com/page/137 (Copy & Paste)