Guāshā 刮痧 is the practice of rubbing a smooth-edged tool across lubricated skin to strongly move Qì and Blood.

Nitric oxide is a key regulator of local circulation. Acupuncture increases the nitric oxide levels to increase local circulation.

Bù tōng zè tòng, tòng zé bù tōng (不通這痛, 痛則不通) means that if there is no free flow there is pain; if there is free flow there is no pain.