Acute conditions and pain. On the yin channels treat disorders of the blood. Nosebleed, coughing blood, blood in stool. Found between the he-sea and ling rive, except in the stomach channel: ST-34. No overlap between the shu transporting and xi-cleft. Qi and blood accumulate in the xi-cleft points. Each of the regular channels and 4 of the extraordinary vessels have a xi-cleft point. These points can be used diagnostically. A sharp or intense pain indicates a repletion, and a dull and mild pain or a depression in the skin surface indicates a vacuity.