Acupuncture has been used to increase circulation for centuries. The techniques inherent in the practice of acupuncture stimulates sympathetic response causing blood vessel dilatation resulting in increased blood flow. This is most notable in the periphery where increased blood flow can be seen. Chi or Qi (energy) circulates in the meridians mainly but is found everywhere in the body. There are many types of Qi that assist in numerous areas of bodily functions. These orchestrate together in synchronistic flow of energy circulation.
Blood stasis syndrome, or blood stagnation (Chinese: Xue Yu) is an important issue to address in circulation issues.