Disease name. One of the symptom diseases. "The Origin and Flow of Miscellaneous Diseases" in "Xizhu: The Origin and Flow of Accumulation, Syndrome, Tumor, and Abnormality" states: "If the internal organs are weak, cold and heat are out of balance, or wind and cold are stagnant in the body, and food cannot be digested, the blood and qi running throughout the body will collide and form lumps. Or due to falls or sprains, the qi will stagnate and the blood will also stagnate. The meridians will be blocked and the blood will not disperse and form lumps. There will be pain in the heart, abdomen, ribs and ribs, and the person will gradually become emaciated and have difficulty eating. This is called blood disease."