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Xu Aihui stated: The character "lin" (strangury) here differs from the common usage of "lin" in "chi lin" (red strangury). The latter refers to red leukorrhea, pertaining to female essence and blood; whereas this refers to abnormalities in urination.

Strangury during pregnancy is termed Zi Lin (Fetal Strangury). Inability to urinate is termed Zhuan Bao (Displacement of the Bladder). Zi Lin presents with frequent urination, scanty drops, and pain; Zhuan Bao presents with frequency but scanty urine without pain. Zi Lin belongs to deficiency of Yin in the Liver meridian with blazing fire; Zhuan Bao occurs because the bladder is compressed by the fetus. The bladder has only one opening. When not urinating, its opening faces upward. At the end of the opening lies a horizontal tube; the upper half is named the Lower Jiao (Lower Burner), and the lower half is the urethral meatus. Before urination, the base of the bladder hangs down like a bottle, with its opening at the top, facing directly opposite the Lower Jiao. Urine seeps in from the Lower Jiao, hence it is said: "The Lower Jiao separates from the ileum and seeps into the bladder." When desiring to urinate, the Qi lifts the base of the bladder, tilting it like an inverted bottle, so that its opening faces downward, and urine flows out from the urethral meatus. Hence it is said: "When Qi transforms, it can be excreted." The condition of Zhuan Bao arises because the large fetus compresses the bladder, or due to Qi deficiency failing to lift the base of the bladder. For Qi deficiency, tonify Qi; for fetal compression, support the fetus. Blindly administering diuretic agents is of no benefit to the disease and instead damages healthy Qi.

Xu Aihui stated: Wang Ang further posited that twisting and inversion of the membrane system, accompanied by acute pain below the umbilicus, constitutes Zhuan Bao, where urination may be either frequent or obstructed. These two explanations differ slightly.

Formula for Zi Lin:
Sheng Di Huang (Rehmanniae Radix), E Jiao (Colla Corii Asini), Huang Qin (Scutellariae Radix), Hei Shan Zhi (Gardeniae Fructus Carbonized), Mu Tong (Akebiae Caulis), Gan Cao (Glycyrrhizae Radix et Rhizoma). Decoct in water and take orally.

Zhu Danxi treated a pregnant woman with urinary retention. He instructed a woman to apply sesame oil to her hand, insert it into the vagina, and lift the fetus. Urine then flowed out like a stream. Subsequently, he prescribed a large dose of Ren Shen (Ginseng Radix et Rhizoma), Huang Qi (Astragali Radix), and Sheng Ma (Cimicifugae Rhizoma) decocted in water. He also treated another woman with Zhuan Bao using Ren Shen and Dang Gui (Angelicae Sinensis Radix) decocted, curing her through induced vomiting.

Shen Yaofeng stated: Wang Ang recorded this formula as Shen Zhu Yin (Ginseng and Atractylodes Decoction). It uses Dang Gui, Shu Di Huang (Prepared Rehmanniae Radix), Xiong Qiong (Ligustici Chuanxiong Rhizoma), Shao Yao (Paeoniae Radix), Ren Shen, Bai Zhu (Atractylodis Macrocephalae Rhizoma), Chen Pi (Citri Reticulatae Pericarpium retaining white pith), Ban Xia (Pinelliae Rhizoma Praeparatum), and Zhi Gan Cao (Honey-fried Glycyrrhizae Radix et Rhizoma), added with fresh ginger, decocted and taken on an empty stomach. Zhu Danxi discussed: The disease of constrained bladder often affects women who are constitutionally weak, prone to worry and depression, irritable in temperament, or consume rich flavors. Ancient formulas using slippery/diuretic drugs rarely yielded efficacy. Therefore, I reasoned that the bladder does not rotate itself; it is compressed by the fetus. If the fetus is lifted, the bladder will naturally relax, and the water pathway will clear. Recently, a favored concubine in the Wu household suffered from this. Her pulse was seemingly choppy (Se), becoming wiry (Xian) upon heavy pressure. I said: This resulted from worry and distress. A choppy pulse indicates deficient Blood and excess Qi; a wiry pulse indicates fluid retention. Deficient Blood means the fetus is weak and cannot be supported; excess Qi with fluid retention causes turbidity in the Middle Jiao which overflows, causing the fetus to shift downward. Thus, I administered the aforementioned medicine and decoction, followed by inducing vomiting with a finger to expel the medicinal juice. After the Qi settled, I administered the medicine again, resulting in peace. Initially fearing it was merely a lucky coincidence, subsequent treatments on several patients were all effective.

Zhang Zhongjing stated: If a woman was originally robust but now appears emaciated, and the membrane system is twisted and inverted, healing can be achieved by promoting urination. It is appropriate to administer Shen Qi Wan (Kidney Qi Pill): primarily due to the presence of Fu Ling (Poria). Di Huang (Rehmanniae Radix) serves as the Sovereign herb, its function being to nourish the uterus. Another method: Invert the pregnant woman vertically; once the membrane system rotates back, urination will naturally resume.

Shen Yaofeng stated: Wang Ang collected An Rong San (Peaceful Glory Powder) from *Ben Shi Fang* to treat Zi Lin accompanied by vexation and restlessness. He asserted that Zi Lin is caused by deficient heat in the Bladder and Small Intestine. Deficiency fails to control water; heat fails to promote free flow, resulting in strangury. The Heart and Small Intestine are exterior-interior paired, hence vexation and stuffiness occur. The formula uses the sweetness of Ren Shen and Gan Cao to tonify deficiency; the permeating nature of Mu Tong and Deng Cao (Junci Medulla), and the slippery nature of Hua Shi (Talcum), to unblock strangury. Lung dryness prevents Heaven Qi from descending, which Mai Dong (Ophiopogonis Radix) can clear; Kidney dryness prevents Earth Qi from ascending, which Xi Xin (Asari Radix et Rhizoma) can moisten; Blood dryness leaves the channels unfed, which Dang Gui can nourish. There are also cases caused by internal injury to the uterine gate from sexual exhaustion, leading to deficiency of the Chong and Ren meridians. In such cases, Ba Zhen Tang (Eight Treasures Decoction) or Shen Qi Wan is appropriate.