Directional supplementation and drainage

An acupuncture technique whereby the needle is angled with or against the flow of qì in a channel to produce a supplementing or a draining needle stimulus. A needle pointing in the direction of the channel flow produces supplementation, whereas one pointing counter to the direction of the flow produces drainage. See needle manipulation (technique).

Etymology

Chin 迎 yíng, against, head on, advance to meet (an oncoming or arriving person or thing); 随 suí, following, with.