Blood is a product of water and grains undergoing energy transformation, and it is closely related to the heart, spleen, and kidneys. There are three basic types of blood disorders: blood deficiency, blood coagulation, and "hot blood."

Blood deficiency means a shortage of blood due to loss of blood or insufficient production of blood. Blood deficiency can be seen in anemia, chronic waste disease, neurosis, parasites, and irregular menstruation, with the following symptoms: pale complexion, light color of nails, light color of tongue, and fine pulse (there may be an empty pulse after massive bleeding). In order to treat it, it is necessary to tone up the blood or strengthen the energy and tone up the blood at the same time.

Blood coagulation, or blood stasis, can be seen in coronary disease, menstrual pain, suppression of menses, extra-uterine pregnancy, external injuries, and carbuncles, with such symptoms as acute pain in the affected region, mostly prickling pain in a fixed region and pain getting worse on pressure or local swelling with lumps, pain in the lower abdomen before menstruation, scant menstrual flow in purple-black color and in lumps, and dark purple color of tongue with ecchymosis on the tongue. In order to treat it, it is necessary to activate the blood and transform coagulations.

"Hot blood" is mostly seen in "hot" diseases of external causes, such as measles, scarlet fever, and encephalomyelitis. Sometimes it can also be seen in such diseases as allergic purpura, aplastic anemia, and leukemia, as well as various diseases of bleeding. The following symptoms may be present: red swelling, bleeding, skin eruptions, premature menstruation, excessive menstrual flow in fresh-red color, mental depression, thirst, reddish urine, and constipation or fever, red tongue with a yellowish coating, and rapid pulse. In order to treat hot blood, it is necessary to cool the blood, clear up heat, and counteract toxic effects.