Blood stasis, a pathogenic process of disordered Blood flow, produces Stagnated Blood, a pathogenic product. Normally, Blood’s constant flow is driven by Heart-Qi. When Blood circulation is inhibited, it stagnates in blood vessels, Zang-Fu organs, etc. Stagnated Blood, may be in blocked blood vessels, clots in bleeding, subcutaneous purpura and lumps. It may manifest as pain, palpitations and mania.