Lacquer Tree Seed Classic Formulas … Natural Herb Library

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Activates blood and stops bleeding when bleeding is mixed with stasis ... Qi Zi is a niche historical material used for blood in the stool, blood in the urine, and uterine bleeding with obstructive features.
Warms the channels and stops pain ... older sources extend its use to cold-stasis abdominal pain and amenorrhea with congealed obstruction.
Belongs to a conservative documentary lane, not a casual tonic or household remedy ... the lacquer-tree identity carries real toxicologic and allergy implications.

Qi Zi with Pu Huang or San Qi ... traditional logic for bleeding patterns complicated by blood stasis rather than by pure deficiency.
Qi Zi with Yan Hu Suo or Dang Gui ... historical pairing style for cold-stasis abdominal pain and obstructed menstruation.
Warm-channel combinations with Ai Ye or Xiao Hui Xiang ... used when pain and bleeding reflect cold with congealed blood.

Chinese-language materia medica references describe Qi Zi as pungent, warm, and toxic, entering the Liver and Spleen to activate blood, stop bleeding, warm the channels, and relieve pain.
Classical caution notes warn against casual use when there is no stasis to resolve.