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Zhu Danxi stated: Dampness is the qi manifestation of Earth. Since Earth is the child generated by Fire (in Five Elements theory, Fire generates Earth), dampness diseases often arise from Heat, as fiery heat can generate the dampness of Earth. Some ask: Although there are discussions on Warmth, Wind, Cold, and Dampness, no so-called "Damp-Heat disease" has been heard of. In fact, among the pathogenic factors of the Six Qi, Damp-Heat accounts for eight or nine out of ten cases. Therefore, *Nei Jing* (The Inner Canon) states: "Dampness tends to moisten upwards accompanied by Heat." It also says: "Due to Dampness, the head feels as if wrapped; if Damp-Heat is not eliminated, the large tendons become short and soft, while the small tendons become long and lax. Shortening leads to spasms/cramps, while laxity leads to flaccidity/paralysis." Some say: "Warmth is within it." Others say: "Damp-Heat is within it." These are the ancients' discussions on the subtle aspects of the condition. People in the world suffering from Dampness diseases may dwell in low, damp places, be exposed to rain and dew, lie in cold and moist environments, or wear sweat-drenched clothes, all of which can cause harm. Their symptoms include joint pain with irritability, limb numbness and heaviness, and a deep, fine pulse, named Shi Bi (Dampness Bi syndrome). If urination is difficult but stool is loose, one should promote diuresis. If body pain with irritability occurs with a deep and slow pulse, it is named Chong Shi (Heavy Dampness). If the whole body hurts and turns yellow with free urination, one should dry the Spleen Earth. If limbs are heavy but movable, with slight sweating on the forehead, aversion to removing blankets, slight edema, or a floating pulse, it is named Feng Shi (Wind-Dampness), caused by the struggle between true Wind and Dampness. Treatment should involve mild diaphoresis to expel both Wind and Dampness through sweat. Profuse sweating will expel Wind but retain Dampness, leading to cold legs, chest and abdominal fullness, headache, excessive sweating, delirium, and a pulse that is soggy at the Yang position and urgent/small at the Yin position, named Shi Wen (Damp-Warmth). If Dampness injury is compounded by Summerheat, forming this condition via Damp-Heat struggle, diaphoresis is contraindicated; inducing sweat will likely cause aphonia, deafness, and loss of pain/temperature sensation, known as Zhong Yue (Severe Summerheat). For patients with excess Cold-Dampness, pain and swelling occur. Purging is strictly forbidden in Dampness patients; if purging causes forehead sweating, slight wheezing, and free urination, it is incurable; likewise, unceasing diarrhea is incurable. Those with inherent weak Spleen and Stomach, retaining phlegm-fluids internally, and exposed to external dampness, may experience Phlegm-Dampness struggling and rushing upward to the chest and heart, causing salivary flooding and obstruction, facial paralysis, hemiplegia, and coma, resembling Stroke (Zhong Feng). However, the pulse is deep and choppy or deep and fine, so it must not be treated as Stroke. This is because the Spleen Earth prefers dryness and dislikes dampness; when invaded by flowing dampness, such diseases arise. Treating it as Stroke would further weaken Spleen Yuan Qi and increase Phlegm-Dampness, leading to critical danger. Dai Ren (Zhang Congzheng) discussed Dampness syndromes, identifying Damp-Heat as the source and Wind-Cold as concurrent factors, deeply grasping the essence of *Nei Jing*. Treating Dampness allows its movement, dispersing the pathogen; as Dampness moves, Qi circulation resumes, resolving temporary blockages. Unknowingly, once Dampness moves, recovery is sudden; with Wei Qi support, or via acupuncture, peace is restored. Some physicians believe opening up causes stagnation, unaware that opening facilitates Dampness movement; this is a flexible approach for treatable conditions, requiring differentiation of upper/lower and internal/external origins. External contraction may result from mist, rain, or clouds, wind exposure during bathing, cold depression from wading, or sitting/lying in drafts after sweating. Clear qi from low ground invades deficiency, rising from below to cause heavy head, nasal congestion, and irritability. Exterior constraint causes chills and fever, sallow complexion like smoked yellow, deep penetration into joints causing heavy pain, dorsal foot edema, and a floating-slow pulse. *Nei Jing* says: "Earth's dampness, when invading, harms skin, flesh, tendons, and vessels." It also says: "Those injured by Dampness are first affected below," indicating external contraction. The general rule is: above the waist, use diaphoresis; below the waist, use diuresis. Li Dongyuan said: "When Dampness prevails, assist with Wind herbs to pacify it," referring to using Wind herbs for exterior dispersion. Classics state: "For Dampness prevailing above with Heat, treat with Bitter-Warm herbs, assisted by Sweet-Acrid herbs, stopping when sweat occurs." This is the method for treating Upper and Exterior. Internal generation may result from excessive alcohol and food, overconsumption of liquids, stagnation of greasy foods, aged sweet/slippery items, roasted/spicy foods, or excessive rich diet. Qi-Heat steaming causes turbid fluids to stagnate and overflow internally, generating Dampness from within. Severe cases cause spasms and rigidity, cholera-like vomiting and diarrhea; mild cases cause epigastric fullness, lethargy, drowsiness, heaviness, and weakness. Flowing into joints causes painful irritation; entering collaterals prevents flexion and extension. Water nature is moist and downward; without Yang warmth, stagnation in collaterals causes edema and soft muscles like mud, leaving indentations upon pressure, with a deep-submerged pulse. *Nei Jing* says: "Dampness is within." It also says: "Spleen dislikes Dampness," indicating internal origin. Treatment: Spleen suffers from Dampness, urgently use Bitter herbs to dry it. Also: "When Dampness invades internally, use Bitter to dry, and Pale to drain." Since Dampness forms internally, drying and diuresis are appropriate, not exterior dispersion. This is the method for treating Internal and Lower. Thus, Dampness is divided into Upper/Lower and Internal/External, with corresponding herbal strategies. *Jin Gui Yao Lue* formulas use diaphoretics to disperse Dampness; ancient formulas use Hot herbs to dry Cold-Dampness; Li Dongyuan uses Wind herbs to overcome Dampness; Liu Hejian uses Cool herbs to treat Damp-Heat. Generally, Pale-draining herbs promote Dampness elimination. Various schools have elaborated mutually. Predecessors described each syndrome with specific theories; success depends on the physician's ability to identify the disease, whether internal/external, deficiency/excess, or influenced by Six Excesses or Seven Emotions, pinpointing the affected meridian for effective treatment.