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Chapping Ding (Lip Carbuncle) arises on the upper and lower lips, caused by Fire-Toxin in the Spleen and Stomach meridians. Initially, it resembles millet grains; it may be painless or extremely itchy. Its form is minute, but its toxicity is profound, with color varying between red and white. If the lips exhibit purple-black discoloration, the root progresses rapidly; within one day, the head and face swell, and death ensues within three to four days. The nature of Ding-Toxin is that the smaller it is, the more aggressively it spreads. Treatment requires urgent purging of Fire-Toxin without damaging the Qi of the Spleen and Stomach, allowing the toxin to dissipate easily. Primary formulas include Chan Su Wan (Toad Venom Pill) and Xijiao Dihuang Tang (Rhinoceros Horn and Rehmannia Decoction). Externally, Baixue Dan (White Snow Powder) is applied into the center of the lesion, covered with a plaster, and removed the next day to express toxic blood. If the toxin has not fully discharged, the application is repeated. Additionally, at the onset, carefully inspect the Weizhong (BL-40) acupoint in the popliteal fossa for purple-black veins; puncture these with a long needle to release blood, thereby draining the toxin.

Jian Chun (Silkworm Cocoon Lip) also occurs on the lips. The Classics state: "The lip is the external manifestation of the Spleen." And again: "The brilliance of the Spleen manifests in the lips." Therefore, dryness causes chapping, heat causes cracking, wind causes twitching, and cold causes contraction. If swelling occurs with white skin wrinkling and cracking resembling a silkworm cocoon, it is named Jian Chun. Etiology may involve excessive worry and urgency leading to scorching Heart-Fire transmitting to the Spleen Meridian, or accumulation of heat from rich wine and food damaging the Spleen, resulting in exhaustion of Kidney Water. One must examine the cause of the syndrome. By tonifying Kidney Water and generating Spleen Blood, dryness naturally moistens, fire is eliminated, wind subsides, and swelling resolves. Gui Pi Yang Rong Tang (Restore the Spleen and Nourish the Nutrient Decoction) is the primary formula. For those with thirst, Jiajian Bawei Wan (Modified Eight-Ingredient Pill) is taken in the morning, and Qinggang Ganlu Yin (Clear Diaphragm Sweet Dew Drink) at noon, to nourish the source of transformation. In women suffering from this condition, due to deficiency of Yin-Blood, Si Wu Xiao Yao San (Four Substances and Free Wanderer Powder) is used.

Furthermore, Chun Gan (Lip Ulcer) appears around the lips of infants, presenting as red, denuded skin with frequent dryness and cracking. This results from Damp-Heat in the Spleen Meridian or accumulated Heat in the Stomach rising upward. Infants often extend their tongues to lick the area to moisten the dryness. Bai Zhi (Angelicae Dahuricae Radix) and Wu Bei Zi (Galla Chinensis) are ground into powder and sprinkled on the lesion for cure.

Kou Chuang (Oral Ulcer) and Kou Mi (Oral Thrush/Mucosal Erosion) result from stagnation of Heart and Spleen Qi combined with external Wind-Heat invasion. At the onset, cooling herbs should not be applied immediately, lest cold congeal and fail to disperse, leading to internal ulceration and spread, making prolonged healing difficult. One must first use pungent, light, ascending, and dispersing agents, followed by cooling measures, to allow constrained Fire to vent outward, then treat according to the specific etiology. If the pulse is excess and forceful, accompanied by dry mouth, diffuse redness, and severe erosive patches, this indicates Excess Fire; Liang Ge San (Cool the Diaphragm Powder) is indicated. If the pulse is deficient and there is no thirst, with pale oral mucosa and fine white spots, this stems from excessive mental agitation, excessive wakefulness with insufficient sleep, causing Deficient Fire to attack upward; Zhi Bo Si Wu Tang (Anemarrhena, Phellodendron, and Four Substances Decoction) augmented with Mu Dan Pi (Moutan Cortex) and Rou Gui (Cinnamon Bark) is appropriate. Furthermore, when Spleen Yuan is weak and Middle Qi is insufficient, failing to anchor Lower Jiao Yin-Fire, which ascends to cause oral ulcers and erosion, this corresponds to Zhu Danxi's description of overexertion leading to Deficient Fire flaming upward, roaming uncontrolled, causing tongue breaks and oral ulcers. In such cases, Li Zhong Tang (Regulate the Middle Decoction) augmented with Fu Zi (Aconite Lateral Root) is indicated. Mistaking this for Excess Heat and mistakenly administering cooling drugs will inevitably cause harm. Regarding infants, this condition arises because Yin-Qi is not yet generated, while Yang-Qi is predominant; additionally, excessive warmth in care leads to accumulation of Heat in the Heart and Spleen, steaming upward and manifesting. Treatment should focus on purging Heart-Fire, resolving toxicity, and clearing heat. If an infant under one month old presents with various diseases but lacks saliva in the mouth, the prognosis is ominous.