Not as ancient as Aryuvidic therapy, but nevertheless Acupuncture is still a 2,500 year old Chinese medicine-based approach for treating a variety of conditions by triggering specific points on the skin with needles. This minimally invasive treatment stimulates nerve-rich areas of the skin surface in order to influence tissues, gland, organs, and various functions of the body and can be excellent at treating chronic pain.
Each needle produces a tiny injury (which causes almost no discomfort). This stimulates a signal to let the body know it needs to respond, and that response positively effects the immune system, promoting circulation to the area, wound healing, and most importantly, modulates pain. Modern day research on acupuncture relies almost completely on this scientific theory.