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Lin syndrome was anciently called "Long" (obstruction), differing only in name. "Long" implies stagnation and blockage; "Lin" implies dripping or trickling. Although the current name is colloquial, it is more accurate in meaning. Ancient texts state that Qi stagnation in the Heart and Kidney leads to dysfunction of the Small Intestine and Bladder. Additionally, there are Cold Lin, Damp Lin, and Heat Lin, which belong to External Etiology (external pathogenic factors). Since Qi stagnation in the Heart and Kidney, along with emotions such as fright, worry, fear, and rumination, are mentioned, these constitute Internal Etiology (internal pathogenic factors). Furthermore, improper diet (hot or cold), excessive sexual activity, imbalance of labor and rest, and holding urine often lead to this disease, which constitutes Non-Internal/External Etiology (factors neither purely external nor purely internal). The Three Causes (Etiologies) are clearly elucidated, and the principles of the Five Types of Lin are comprehensively understood. Although symptoms vary, they can be inferred analogously; grasping the essence allows one to summarize it in a single statement.

Generally, there are five types of Lin: Cold Lin, Heat Lin, Gao Lin (Paste Lin), Xue Lin (Blood Lin), and Shi Lin (Stone Lin). These five types differ but all have Qi mechanism as their root. They are mostly caused by chaotic emotional desires, combined internal and external pathogens, interference between clear and turbid Qi, and disharmony of Yin and Yang, leading to accumulation in the Lower Jiao, resulting in Lin and Bi (obstruction) syndromes.

To treat Cold Lin, characterized by scanty, difficult urination, frequent urges without passage, pain in the urethra, and aversion to cold with shivering. This is often due to excessive water intake, condensation from cold, deficiency of the Heart, and depletion of willpower.
Fuzi (Aconiti Lateralis Radix Praeparata, peeled and navel removed, raw use) 50g, Huashi (Talcum) 50g, Qumai (Diantherae Herba) 10g, Mutong (Akebiae Caulis) 10g, Banxia (Pinelliae Rhizoma Praeparatum, washed seven times in boiling water) 10g.
Grind the above into powder. Take two large qian (approx. 6-9g) per dose, decoct with two zhan (approx. 400ml) of water, seven slices of Shengjiang (Zingiberis Rhizoma Recens), twenty stems of Dengxincao (Junci Medulla), and half a spoon of Fengmi (Melle), until reduced to seventy percent. Take on an empty stomach.

To treat Heat Lin. This is mostly due to insufficiency of Kidney Qi and heat in the Bladder, causing obstruction of the urinary pathway, dribbling and incomplete voiding, small volume with high frequency, urgent pain in the umbilical and abdominal region, intermittent attacks triggered by fatigue, cloudy urine resembling bean dregs, or passage of sand and stones.
Mutong (Akebiae Caulis) 60g, Shiwei (Pyrrosiae Folium, de-haired) 60g, Gancao (Glycyrrhizae Radix et Rhizoma) 30g, Danggui (Angelicae Sinensis Radix) 30g, Wangbuliuxing (Vaccariae Semen) 30g, Huashi (Talcum) 90g, Baizhu (Atractylodis Macrocephalae Rhizoma) 90g, Qumai (Diantherae Herba) 90g, Shaoyao (Paeoniae Radix Alba) 90g, Kuizi (Abutilonis Semen) 90g.
Grind the above into fine powder. Take two qian (approx. 6g) per dose, mixed with Xiaomai (Tritici Fructus Decoctum), taken before meals, three times daily. Also treats residual heat after severe diseases that subsequently transforms into Lin syndrome.