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In Taiyang disease (Sun Yang Disease), the manifestation of "moving qi" refers to a throbbing sensation within the abdomen. This occurs due to dysfunction of the zang organs, where the pathological qi follows the affected organ and manifests around the umbilicus, presenting as throbbing with a "zhuzhu" (pounding) sensation, termed "moving qi". The *Nan Jing* (Classic of Difficult Issues) states: For internal liver syndrome, there is moving qi on the left side of the umbilicus, which feels firm and painful upon pressure; for internal heart syndrome, there is moving qi above the umbilicus, which feels firm upon pressure; for internal lung syndrome, there is moving qi on the right side of the umbilicus, which feels firm upon pressure; for internal kidney syndrome, there is moving qi below the umbilicus, which feels firm upon pressure.

If purgation is incorrectly applied, damaging Lung Qi, symptoms such as dizziness and palpitations may occur. When moving qi is located in the lower region (referring to the Kidney), sweating therapy is contraindicated. If sweating is induced, it leads to anhidrosis, severe mental restlessness, severe pain in the bone joints, dizziness with aversion to cold, vomiting after eating, and inability to retain food. This indicates that sweating has disturbed Kidney Qi. Purgation is also contraindicated when moving qi is in the lower region. If purgation is used, it results in abdominal fullness, sudden dizziness upon rising, passage of undigested food after eating, and epigastric stuffiness. This indicates that purgation has disturbed Kidney Qi.

For internal spleen syndrome, there is moving qi directly at the umbilicus. The classic text specifically mentions moving qi around the four sides of the umbilicus but omits the Spleen. This is because the Spleen governs the central region and transports fluids for the Stomach. Therapies such as sweating, vomiting, and purging deplete body fluids and inevitably disturb the Spleen first. Even if other four zang organs' moving qi is activated, improper use of sweating or purging will still disturb the Spleen first. Since the Spleen's qi is already activated, how can it be further disturbed? Therefore, the text deliberately does not mention the Spleen.

In Taiyang disease, it is essential to carefully inquire about external syndromes because these conditions are not always visible in the pulse and must be confirmed through inquiry. When employing sweating, vomiting, or purging therapies, one must exercise extreme caution. By understanding this case of moving qi, similar cases can be inferred by analogy.

The verse states: "There are various formulas for Ben Tun (Rushing Pig) and moving qi; carefully assess their positions on the left, right, high, and low. Li Zhong Tang (Regulate the Middle Decoction) without Bai Zhu combined with Gui Zhi is used; details on contraindications for sweating and purging are explained in the relevant regulations." Moving qi is not limited to the umbilical area; without inquiry, how could it be known? Therefore, in managing Taiyang disease, meticulous inquiry into symptoms is paramount. The specific herbs for treating moving qi are detailed in the sections regarding contraindications for sweating and purging.

After purgation in Taiyang disease, if Qi rushes upward, Gui Zhi Tang (Cinnamon Twig Decoction) should be administered. If Qi does not rush upward, this formula is contraindicated. If Qi rushes from the abdomen up to the heart region, Gui Zhi Jia Gui Tang (Cinnamon Twig Decoction plus Cinnamon Twig) is indicated. After sweating, if there is palpitation below the umbilicus, it suggests impending Ben Tun (Rushing Pig Syndrome); Fu Ling Gui Gan Da Zao Tang (Poria, Cinnamon Twig, Licorice, and Jujube Decoction) is prescribed. For general treatment of moving qi, Li Zhong Tang (Regulate the Middle Decoction) without Bai Zhu (Atractodis Rhizoma) plus Gui Zhi (Cinnamon Twig) is commonly used. Gui Zhi promotes urination and dissipates Ben Tun.

If dizziness arises from erroneous sweating disturbing the meridians, Bai Zhu (Atractodis Rhizoma) can be used to secure the exterior and stop sweating. For Ben Tun and moving qi presenting with a deep and weak pulse and cold limbs, Yang Zheng Dan (Yang-Protecting Pill) may be given. Regarding the discussion on the syndrome and treatment of moving qi, Chai Hu Gui Zhi Tang (Bupleurum and Cinnamon Twig Decoction) can be utilized.