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[Formula Verse] When a sore ulcerates and is mistakenly exposed to dirty water or toxins, or when injured by sharp objects like wood splinters penetrating to the bone, apply Jinchan San (processed by calcination) inside the wound. Once the toxic fluid drains completely, the splinter will also be expelled.

[Annotation] If an ulcerated wound is contaminated with soap pod water, donkey or horse urine and feces, or any other filthy toxic fluids entering the sore, or if a wood splinter penetrates into the wound causing inflammation, swelling, and severe pain extending to the bone, first wash the wound with warm water and dry it. Then, prepare Jinchan San (processed by calcination) appropriately and sprinkle it inside the wound. Cover it externally with Jiawei Taiyi Gao. After some time, the toxic fluid will drain completely, and any splinter will naturally come out.

Formula: Jinchan San
Composition: Large dried toad (one), Hu Jiao (Black Pepper, Piperis Nigris Fructus) (15 grains), Zao Jiao Zi (Gleditsiae Sinensis Semen) (7 grains).
Place the above ingredients in a dry pot, cover the mouth of the pot with a tile, and slowly roast (calcine) over low heat until the smoke disappears. Remove the medicine, preserve its efficacy, grind into fine powder, and use.

[Formula Verse] Jinchan San treats sores ulcerated by exposure to dirty water toxins; swelling and pain may result from wood splinter injuries. Using Toad, Black Pepper, and Soap Pod seeds, roasted until smoke ceases then ground and sprinkled yields good results.

Another Formula: Jiawei Taiyi Gao (See Ulceration Section)

[Formula Verse] In summer, various sores become foul and rotting, with flies breeding maggots; treatment should not be delayed. Taking Chanhua San can eliminate them; the maggots turn into water and are discharged, while flies fear the powder and stay away.

[Annotation] In summer, various sores ulcerate, rot, and emit a foul odor. Or, for solitary or lazy individuals who neglect bathing, accumulating pus and filth, flies gather due to the smell, leading to maggot infestation. One should immediately take Chanhua San; the maggots will all transform into water and discharge, and flies will dare not approach the sore. For infants whose smallpox lesions ulcerate and breed maggots, administer the aforementioned medicine as well. Externally, sprinkle fine powder of Hanshuishi (Halloysitum Rubrum) on the area. This also treats sudden foul odor of sore pus. Cases of maggot infestation in winter ulcerations are caused by yin-dampness transformation. It is suitable to sprinkle powdered Hai Shen (Sea Cucumber, Holothuria) or Fei Guo Fan (Calcined Alumen, Alumini Sulphas Preparatus) powder. The maggots will also transform into water.

Formula: Chanhua San
Composition: She Tui (Bombyx Batryticatus / Snake Skin, Ophiopogonis Folium? Note: Text says She Tui which is usually Snake Skin, but context implies insect/reptile skin often used for worms. Standard term: Serpentis Shed Skin, Ophichtri Cutanea) [Burned to preserve efficacy, ground to powder, 1 liang], Chan Tui (Cicadae Periostracum), Qing Dai (Indigo Naturalis) [each 5 qian], Xi Xin (Asari Radix et Rhizoma) [2 qian 5 fen].
Grind the above into powder. Take 3 qian per dose, mixed with Huang Jiu (Yellow Wine), taken twice daily.

[Formula Verse] Chanhua San treats various sores with filth; in summer, maggots appear surrounded by flies. Using Snake Skin, Xi Xin, Cicada Shell, and Qing Dai, mixed with wine causes maggots to dissolve and flies to flee in fear.