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The *Famous Doctors' Records* states: Princess Li Wang suffered from a throat carbuncle (throat abscess), experiencing pain and swelling for several days, unable to eat or drink. The summoned imperial physicians all stated that it was necessary to use a knife and needle to lacerate and drain the pus. Upon hearing that knives and needles would be used, the princess cried and refused treatment. As the pain intensified and she could not take in food or water, suddenly a folk physician appeared and said, "I will not use knives or needles; I will only dip the tip of a brush into medicine and apply it to the carbuncle, which will rupture instantly." The princess was delighted and ordered him to be summoned. After applying the medicine twice, the carbuncle ruptured, discharging over a cup of pus and blood, providing immediate relief. Within two days, the wound healed without incident. When asked to provide his prescription, the physician replied, "I merely tied a needle to the center of the brush and gently scratched the area to induce rupture. There is no other prescription."

During the Xianping era of the Song Dynasty, Wei Gong, the Director of the Bureau of Military Appointments, was serving in Tanzhou. Several of his young sons were playing together. One used a fishing rod with a hook suspended by a line, using jujube flesh as bait, to try and catch chicks on land. One son imitated this action but accidentally swallowed the hook. It lodged in his throat, and when they tried to pull it out urgently, the barbs had reversed direction, preventing its removal. Various physicians were summoned, but none dared to attempt the procedure. Wei Gong was terrified and questioned old women everywhere, believing they must have experienced such incidents. At that time, an old woman nearly ninety years old stated that she had never seen such a case but surmised that someone with expertise could retrieve it. In the prefecture, there was a skilled craftsman named Mo Duliang (Master Mo, the Chief Architect). News reached Wei Gong. Wei Gong called the old woman and reproached her, saying, "My child has swallowed a hook; how can Master Mo retrieve it?" The old woman replied, "It is said that medicine relies on intent. Master Mo once salvaged steles and pagodas underwater and repaired inverted roof tiles." Wei Gong was pleased, and his relatives urged him, saying, "Try asking him." Thus, Master Mo was summoned. After pondering for a long time, he said, "I need one silkworm cocoon and a string of prayer beads." Wei Gong provided them. Master Mo then cut the cocoon into the shape of a coin, softened its four sides with materials, lubricated it with oil, and pierced a small hole through the center. He threaded the hook wire through it, followed by three to five prayer beads. He instructed the child to sit upright with his mouth open, gradually adding beads to guide the mechanism. In a moment, the hook emerged, and the child was unharmed. Wei Gong was overjoyed and bestowed heavy rewards upon him. Wei Gong remarked, "One whose mind is clear possesses great skill; one whose intent is clear is necessarily a good physician."

Preface: The head is the chief of the body. Once afflicted with disease, regardless of whether the condition is root or branch, it should be treated first. If neglected and left untreated, even if the limbs are intact, they cannot be utilized. Herein, ten prescriptions are examined to treat head diseases, thereby honoring the chief and preserving the utility of the limbs. Those engaged in medicine should certainly strive for this!