Green-blue or purple tongue

A tongue with generalized green-blue or purple coloration. It indicates blood stasis or blood stagnation attributable to (a) intense heat toxin scorching provisioning-yīn and affecting blood flow, (b) to exuberant internal yīn cold inhibiting blood flow, or (c) injuries from knocks and falls. A deep purple (crimson turning purple) reflects heat. A pale green-blue tongue that is glossy reflects cold.

See tongue examination.