When the body always stiffens in the same places
Shoulders, back or legs that always stiffen in the same places, limbs that feel heavy or numb, discomfort that grows in cold, damp weather or after long periods without moving, a feeling that movement no longer flows… In TCM, these signs may be associated with Blood stasis lodged in the meridians and secondary channels of the limbs, often mixed with lingering Wind-Dampness. The two blockages feed each other: congealed Blood stops the Qi, and stopped Qi no longer pushes the Blood.
Shen Tong Zhu Yu Tang appeared in 1830, under the Qing, in the Yi Lin Gai Cuo (《医林改错》) by Wang Qingren (王清任), the physician who placed Blood stasis at the heart of his thinking. He left a famous image: water gripped by Wind and Cold freezes into ice, and the ice remains once the wind has dropped. Dispelling Wind or Dampness is therefore not enough; the Blood that has already congealed must be set moving again. It is one of his five decoctions “that dispel stasis”, each devoted to one region of the body, alongside Xue Fu Zhu Yu Tang and Shao Fu Zhu Yu Tang; this one is turned towards the limbs.
Melt the ice, then set things moving again
The Blood herbs have the highest doses: peach kernel and safflower, Chinese angelica and achyranthes, backed by Sichuan lovage and myrrh. With lighter doses, large-leaf gentian disperses what remains of Wind-Dampness and cyperus sets the Qi in motion. Licorice moderates the strength of the whole.
Invigorates the Blood and moves the Qi: Sichuan lovage, which tradition calls “the Qi herb within the Blood”, and cyperus move the Qi forward. According to the classic rule, when the Qi flows, the Blood flows (气行则血行).
Disperses Stasis: Peach kernel, safflower and myrrh help disperse lingering Blood, while Chinese angelica nourishes it, so that the formula does not exhaust it.
Supports circulation and mobility: Achyranthes draws the action towards the lower body and Sichuan lovage towards the upper body, while large-leaf gentian disperses Wind-Dampness from the meridians: the formula addresses the whole body, from the shoulders to the legs.
