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Kui Guang stated: Ya Yong (Tooth Abscess), also known as Ya Qi Feng, initially presents as a small lump growing on the gingival tissue. It may appear above or below, inside or outside. Its characteristics include high swelling, redness, and accompanying chills, fever, and pain. In Ya Yong, the gums are red and swollen, but the mouth can open and close; in contrast, if it is Ya Yao (Trismus/Jaw Locking), the jaw is tightly closed, and the mouth cannot open. This serves as the distinguishing feature. If there is swelling, pain, and protrusion of the gingival tissue due to Ya Yong, first use Jin Dan Bi Dan (prescription recorded in the Throat Section) insufflated into the gums. Externally, use Huang Shu Xiang (Styrax Resin) carved into a chisel shape, gently inserted into the jaw gap to act as a spacer, so that the jaw gradually opens, then insufflate Jin Dan into the affected area. He further stated: Using Kou Gan medicines specifically for treating Ya Yong is the most stable approach. (Prescriptions recorded in the Throat Section)

The Xin Fa (Essentials of Clinical Practice) states: If a Ya Yong ulcer fails to heal for a long time, particularly after excessive consumption of cold-natured drugs, multiple bones (sequestra) will likely form. One must wait until the bone tip pierces through and becomes loose upon shaking before removing it, so that the wound can finally contract and heal.

Chen Shigong stated: Ya Ding (Tooth Carbuncle) grows within the interdental space, with a high, protruding apex, pain radiating to the cheek and neck, and bleeding upon rupture. Acupuncture should be performed first, and treatment should follow the protocols for Ding Chuang (Carbuncles). (From *Waike Zhengzong*)

Kui Guang stated: Ya Ding belongs to Stomach Fire. It erupts on the gums, resembling a bean in size, appearing internally or externally without a fixed location. Treatment should initially involve using Jin Dan Bi Dan, insufflated into the teeth to dissipate the swelling, followed by Kou Gan medicines (prescriptions recorded in the Throat Section), added with Bo He (Menthae Haplocalycis Herba) and Bing Pian (Borneolum Syntheticum) for insufflation. The decoction should include Shi Gao (Gypsum Fibrosum) and Lian Qiao (Forsythiae Fructus).

Kui Guang stated: Ya Yao Syndrome originates in the gingiva at the end of the teeth, characterized by the inability to open the teeth and tight closure of the jaw. This condition starts with severe intensity, worsening significantly at night. Although the presentation appears fierce, it remains treatable. Initially, use Jin Dan and Bi Dan insufflated into the gums. Externally, place a block of Huang Shu Xiu (Styrax Resin) between the teeth. Once the teeth can open, insufflate Jin Dan again. (Prescriptions recorded in the Throat Section)

Kui Guang stated: Ya Jun (Tooth Fungus) grows on the gums, presenting with a purple-black color and an uneven, mushroom-like shape. This arises from excessive fire, blood heat, combined with qi stagnation. It is appropriate to insufflate Kou Gan medicines. (Prescriptions recorded in the Throat Section) along with administering decoctions.