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In Taiyang disease, Yu Mao (depression and dizziness) refers to the stagnation of Qi where it fails to circulate freely, accompanied by mental confusion and lack of clarity. What is commonly referred to as coma in the world corresponds to this condition.

Dizziness (Xuan) in Taiyang disease involves visual disturbances such as seeing spots or darkness, rather than hallucinations. "Xuan" implies a sensation of spinning or rotating, while "Mao" indicates clouding of vision due to the pathogenic factor combining with healthy Qi, causing dizziness; its root cause is deficiency. In Taiyang disease, instances where dizziness or vertigo appears immediately upon onset are typically caused by improper use of sweating, vomiting, or purging therapies, leading to Yang deficiency. As mentioned in the *Ling Shu* (Needle Classic), although skilled physicians exist, treating such conditions can be challenging. Mao is often due to extreme deficiency. For Taiyang disease presenting with headache and chest rigidity belonging to the Three Yang stages, if pulse becomes deep and spontaneous diarrhea occurs after sweating, vomiting, or purging, Lizhong Tang (Regulate the Middle Decoction) should be used. [Text fragment missing regarding women]... Blood deficiency leads to Jue (cold extremities/reversal) and inevitably accompanies Mao.

Head shaking in Taiyang disease occurs because the head is the meeting point of all Yang meridians. All Yang meridians ascend to the head, while Yin meridians reach the neck and chest before returning. If Yang meridians fail to reach... [text fragment missing]... Wind pathogens dominate... [text fragment missing]... If there is pain, speaking exacerbates the pain, necessitating head shaking. The Classics state: "Shaking the head while speaking indicates interior pain." It is also said: "Speaking indicates deficiency, not speaking indicates excess." Generally, these are all forms of head shaking, but analytically, they can be distinguished into excess pathogens, deficient pathogens, and true diseases. One must also clarify organ blockages. Head shaking with fixed gaze and a complexion resembling smoke staining indicates the exhaustion of Heart Qi, representing a true disease that is untreatable. When Taiyang disease manifests as Jing (spasm), symptoms include head shaking, lockjaw, opisthotonos, fever in the upper body, and cold feet, each detailed in specific sections. Head shaking with speech suggests internal pathology; speech indicates deficiency. Such cases may be treated with Rusheng Bing (Rusheng Cake) and Xiongxin Tang (Szechwan Lovage and Asarum Decoction).

Neck stiffness (Xiang Qiang) in Taiyang disease arises from the Taiyang meridian originating at the inner canthus, ascending to the forehead, intersecting at the vertex, entering to connect with the brain, emerging again to descend along the nape, passing through the shoulder blades, and running alongside the spine to... [text fragment missing]... causing tension in the neck. Neck stiffness in Taiyang disease is a Taiyang exterior syndrome, which must be resolved through dispersing methods. In Taiyang disease, if there is stiffness in the neck and back (Jiang Jiang), accompanied by sweating and aversion to wind, Guizhi Jia Gegen Tang (Cinnamon Twig Decoction plus Kudzu Root) is indicated. These are all dispersing formulas. Both conditions involve neck and back stiffness, but the intensity of dispersion varies. Fever, sweating, and aversion to wind indicate an Exterior Deficiency pattern, treatable by releasing the muscle layer; absence of sweat and aversion to cold indicate an Exterior Excess pattern, suitable for inducing sweating, requiring the addition of Mahuang (Ephedrae Herba) and Gegen (Puerariae Lobatae Radix) to Guizhi Tang. If only Gegen is added to Guizhi Tang... [text fragment missing]... allowing movement to first extend... [text fragment missing]... Or if Taiyang Wind Strike is compounded by Cold-Dampness... [text fragment missing]... heat in the head, red face, and red eyes, with isolated head tremors... [text fragment missing]... yet the pulse flows rapidly, this constitutes Jing (spasm). Additionally, Jie Xiong (Chest Binding) disease presents with neck stiffness resembling spasm; if purgatives are incorrectly applied... [text fragment missing]... prescribing decoctions according to the syndrome ensures complete safety. Head and neck stiffness in Taiyang disease is an exterior syndrome and should be resolved by dispersing. If mistakenly treated with purgatives, Taiyang pathogenic wind enters the interior due to deficiency, resulting in Jie Xiong (Chest Binding).