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Weng Kentang stated: "Huanxiang Fa (Ring-shaped Neck Carbuncle) arises around the neck, hence its name. It is also known as Luotou Yong (Head-Dropping Abscess). One must first observe where the swelling originates. If it starts from the Tianzhu point (BL10) at the back, this indicates pathogenic invasion of the Foot-Taiyang Bladder Meridian and the Du Meridian below the Yamens point (DU15), presenting with alternating chills and fever, stiffness and fatigue, chest stuffiness and restlessness, fear, and anorexia; if the swelling extends to the anterior neck, it signifies toxic heat flowing into the Foot-Shaoyang Gallbladder Meridian; if the ears are also swollen, it indicates flow into the Yangming Meridian. Treatment should be differentiated according to the meridians involved. If ineffective, death ensues." (*Yixue Zhunsheng*)

Wang Shengzhi stated: "Jinghuang (Neck Locust) presents with toxicity that is not red, the shape is hard without suppuration, persisting for one and a half to two years in this state, unable to rupture or ulcerate. The two ends lock the neck, consuming human fat and blood; once the toxin has fed sufficiently on blood, the patient faces imminent peril. At the initial stage of toxin manifestation, administer Yiqi Yangrong Tang (Qi-Nourishing and Blood-Enriching Decoction) for more than ten doses. Subsequently, puncture the heads of both lesions with a three-edged needle, followed by moxibustion using seven or nine moxa cones. Then, administer Shenxiao Gualou San (Miraculous Trichosanthes Powder). This will lead to spontaneous resolution." (*Waike Lili*)

Dou Hanqing stated: "Sudden pain in the neck and nape resembling stiff neck is named Fengre Suohou Du (Wind-Heat Lock-Throat Toxicity). Over time, redness encircles the shoulders and back, becoming hard and difficult to treat." (*Chuangyang Quanshu*)

Shen Douyuan stated: "Wugu Gan Shangchuang (Innocent Malnutrition Injury Sore) occurs when children's laundry, while being washed and dried outdoors, is contaminated by droppings and feathers from female birds. Insects enter the skin and hair follicles, causing nodules like bean-sized pellets to form under the flesh behind the child's head and neck. These nodules move upon pushing and are soft but painless. Prolonged exposure allows insects to transform and enter the zang-fu organs, causing emaciation, high fever, purulent bloody stools, splitting of the cranial sutures, and sores on the limbs. Treatment should prioritize Xiaogan Biejia Wan (Insect-Malnutrition Turtle Shell Pill)." (*Qixuan Mizhi*)

Feng Luzhan stated: "Wugu Gan (Innocent Malnutrition) results from laundry left exposed overnight during washing, contaminated by falling feathers from 'innocent' birds. If ingested or contacted by children, it causes fever, progressive yellowish emaciation, and dysentery with purulent bloody stools."

*Xinjian* states: "Nodules like beans appear behind the head and neck, movable upon pressure, soft and painless, containing insect larvae resembling rice flour. If not rapidly punctured and removed, the insects scatter with the heat qi, causing sores all over the body. Once entering the zang-fu organs, dysentery with purulent bloody stools occurs. It is necessary to puncture with a silver needle and apply plaster."

It further states: "There are also gan insects, some resembling hair strands, others like horse tails, emerging between the head, neck, abdomen, and back. Those that are yellow-white with red hues indicate survival; those that are purple-black or green indicate death."