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Jing (Menstruation) refers to the meridians. Blood follows Qi in its movement, circulating throughout the body, and descending in accordance with the lunar cycle without deviating from normal rhythm; thus it is called "Jing Shui" (Menstrual Water). Dai (Leukorrhea) refers to the Dai Mai (Girdle Vessel), which encircles the waist like a belt and controls all other meridians. When it loses its regulatory function, turbid fluids flow out intermittently, hence it is called "Dai Xia" (Leukorrhea). In gynecology, regulating menstruation is of primary importance. If one's Heart and Spleen are robust, menstruation will be regular. This is because the Spleen transports the essence and fluids of the five grains to the Heart, enters the vessels, transforms into red blood, and when blood is sufficient, it flows into the Chong Mai (Penetrating Vessel) and Ren Mai (Conception Vessel) to form menstrual water. If the Heart and Spleen are weak, there is a risk of irregular or absent menstruation. Blood deficiency leads to delayed menstruation, while blood heat leads to early menstruation. When Yin qi overcomes Yang qi, blood fails to circulate properly, resulting in sudden scantiness. When Yang qi overcomes Yin qi, blood scatters and overflows, resulting in sudden profuseness. Excessive worry and thought cause Qi stagnation; Qi stagnation leads to Blood stasis. Excessive anger causes Qi rebellion; Qi rebellion leads to Blood rebellion. When Qi and Blood stagnate and rebel within the Zang-Fu organs and meridians, amenorrhea occurs. Additionally, consuming cold foods before menstruation can obstruct the pathway of the Yangming Meridian, blocking blood vessels. Consequently, abdominal pain or soreness of bones and sinews often precedes each period. After menstruation, Wind-Cold may invade the Uterus through deficiency, damaging the Chong and Ren vessels. The generated blood cannot flow smoothly downward, leading to intermittent dripping, clotting into pieces, etc. All these conditions require treatment based on differentiation of excess and deficiency. Amenorrhea and irregular menstruation are always associated with eye disorders. The eyes are the master of blood vessels. When blood is insufficient, the Spleen fails in its duty, failing to illuminate the eyes. Moreover, Liver Wood becomes uncontrolled, transforming into Fire and generating Wind, causing astigmatism, nebulae, and visual obstructions. Severe cases involve Ministerial Fire ascending to damage Kidney Water (the source), resulting in pale pupils. Menstrual blood reversing upward disturbs the pure essence in the eyes with turbid Yin, potentially causing blood stasis flooding the eyeball or internal cataracts resembling rouge. Ancient sages' treatment methods: For Qi deficiency with Yin excess, Si Jun Zi Tang (Four Gentlemen Decoction) is used as the main formula. For Qi stagnation, Si Jun Zi Tang is modified with Xiang Fu (Cyperus Rhizome) and Yan Hu Suo (Corydalis Rhizome). For Blood deficiency with Yang excess and heat, Si Wu Tang (Four Substance Decoction) is modified with Huang Qin (Scutellaria Root), Huang Lian (Coptis Rhizome), and Dan Pi (Moutan Cortex). For Blood excess with stasis, Si Wu Tang is modified with Tao Ren (Peach Seed) and Hong Hua (Carthamus Flower). For cases caused by worry and thought, Gui Pi Tang (Restore the Spleen Decoction) is used for tonification. For cases caused by anger, Jia Wei Xiao Yao San (Modified Free and Easy Wanderer Powder) is used, assisted by Yue Ju Wan (Pill for Relieving Stagnation) to promote circulation. For distending pain during menstruation, Dang Gui Yi Qi San (Angelica Regulating Qi Powder) is used to move Qi. For internal invasion of Wind-Cold, Dang Gui Yang Rong Tang (Angelica Nourishing Vigor Decoction) with Xie Bai (Allium Macrostemon Bulb) is used to warm and disperse. Leukorrhea can affect all Zang-Fu organs. The text *Chan Bao* states that leukorrhea comprises thirty-six diseases, divided into twelve symptoms, nine pains, seven harms, and five injuries. However, generally speaking, it boils down to only two characters: Deficiency and Excess. Hence, later practitioners simply distinguish between white and red discharge. Whenever Wind, Cold, Damp-Heat pathogens invade the uterine gate and transmit to the Zang-Fu, knotting at the Dai Mai, body fluids surge and overflow. One must differentiate by color: red indicates Heat, white indicates Cold, green indicates Wind, and yellow indicates Dampness. The *Nei Jing* mentions Bai Gu, Bai Ye, and Bai Yin, all primarily attributed to disease of the Ren Mai. Treatment should focus on securing the Ren Mai. If due to Spleen deficiency with sinking of Middle Qi, unable to control and secure, Bu Zhong Yi Qi Tang (Tonify the Middle and Augment the Qi Decoction) should be used to raise Yang. If due to non-interaction between Heart and Kidney, with Ministerial Fire steaming and evaporating essence, Heart-Kidney interaction should be restored. If accompanied by eye disease caused by Wind-Cold-Damp-Heat, nebulae and photophobia will definitely occur. If caused by Spleen deficiency and Heart-Kidney non-interaction, dryness and astringency in the afternoon, or even dim pupils, will occur. These are all due to the hidden consumption of body fluids, lacking nourishment. Generally, it is appropriate to close the essence apertures and open the water pathways, so that clear and turbid substances can be separated. Furthermore, tonifying Qi and Blood and harmonizing Yin and Yang is necessary. When Qi and Blood are robust, pathogenic factors have no opportunity to invade; when Yin and Yang are harmonized, Water and Fire achieve mutual balance (Ji Ji).