Library

Liuwei Dihuang Wan (Six-Ingredient Rehmannia Pill): See the formula in Volume 1, Section on Fetal Diseases.
Liangge San (Cooling the Diaphragm Powder): See the formula in Volume 4, Section on Tongue Diseases.
Rusheng San (Like-Sage Powder): Treats children's gan gangrene (a rapidly progressing and severe oral disease), as well as gingival recession exposing tooth roots and loose teeth.
Usage: Scrape down the white sediment from a woman's urine bucket, burn it on a tile until no more smoke is produced, take one qian; take two fen of Chulv (Malachite, basic copper carbonate); take half a fen of Shexiang (Musk). Grind these together into a fine powder. First, wash the affected area with rice water infused with leaves of the Chinese tallow tree (Vernicia fordii), then apply this medicine.
Xuanfeng San (Dispersing Wind Powder): Treats bruxism (teeth grinding) during sleep.
Ingredients: Jianbinglang (Areca Seed, *Semen Arecae*) five qian, Guangchenpi (Tangerine Peel, *Pericarpium Citri Reticulatae*) one liang five qian, Zhigancao (Honey-fried Licorice Root, *Radix Glycyrrhizae Preparata*) five qian.
Preparation and Usage: Grind together into a fine powder. Take one or two qian per dose, mixed with honey water, taken on an empty stomach.
Shugusu San (Mouse Bone Powder): Treats delayed eruption of permanent teeth after the loss of deciduous teeth in children.
Usage: Take one male mouse, remove skin and flesh, extract the complete skeleton, roast until dry and brittle, grind into a fine powder, add one fen of Shexiang (Musk), apply to the site where teeth are growing, wait for a while, then rinse mouth with ginger soup.

For gum ulceration unresponsive to various medicines, use two or three salted olives, including peel and pit, roasted in fire until "preserving nature" (charred but retaining medicinal properties), add half a fen of Bingpian (Borneol), and apply to the affected area; this yields miraculous effects.
For treating gan gangrene (characterized by foul odor, rotting, and bleeding), take three red dates, remove pits, fill them with finely ground Mingxionghuang (Realgar, *Realgar*), place them on a new tile, roast in fire until "preserving nature," grind into powder, and apply topically.
Another prescription: Fenghuangyi (Chicken Eggshell Membrane), ensuring it has not touched water, bake until yellow, add a small amount of Kufan (Calcined Alum, *Alumen Ustums*), grind together into a fine powder and apply.

The *Classic* states: The pharynx (Yanhou) is the pathway for food and drink; the larynx (Houtong) is the passage for qi to ascend and descend. It also states: When Yin and Yang qi become knotted, it is called Houbi (throat obstruction/swelling). Generally, the pharynx connects to the stomach tube, primarily receiving food and drink, located posteriorly; the larynx connects to the lung tube, exclusively governing respiration, located anteriorly. Together, they are the vital hub of the entire body. If heat toxins accumulate in the chest and diaphragm, generating wind-phlegm that stagnates and fails to disperse, manifesting in the throat and pharynx, although there are many disease names, they are all essentially due to heat toxins. One must clear and resolve quickly; delay leads to incurable danger. For mild cases, Ganjie Tang (Licorice and Platycodon Decoction); for severe cases, Huadu Tang (Detoxification Decoction).
If throat pain occurs due to smallpox, it is caused by toxic vapors attacking upward; use Modified Ganjie Tang.
If sores form in the throat preventing suckling, use Huadu Tang.
If a child is choked by bone fragments, and the bones are large and difficult to swallow, use a goose feather to stimulate the throat to induce vomiting; if the bones are small, treat using formulas from Hai Shang (likely referring to external or folk remedies).