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The muscles and skin of infants are delicate and fragile, making them susceptible to wind pathogens. When wind-cold invades the cutaneous pores (skin texture) and enters the meridians, the wind-cold clashes with the sinews and vessels. Upon receiving cold, the sinews and vessels become tense and contracted, thus causing spasms and contractures of the four limbs.

If wind pathogen strikes the joints and extremities, passing through the sinews and vessels: if the wind carries cold qi, it results in stiffness, spasm, and pain; if the wind carries heat, it leads to flaccidity, laxity, and motor impairment.

According to the *Kanyu Li Nian Tu* (Map of Auspicious and Inauspicious Years in Geomancy), there exists a deity known as the "White Tiger." It is said that when the Tai Sui (Grand Duke Jupiter) is in Mao, the White Tiger is in Yin; by following this logic, one can deduce the location of this deity. If an infant's residence offends this deity, illness may ensue. The manifestations include: slight fever, intermittent crying or calling, occasional chilliness, and fingers flexing and extending as if counting. These symptoms resemble Wind Epilepsy (Feng Xian), but without the twitching (Yong) of the hands and feet.

The throat is the pathway for Qi. The epiglottis (Hou Yan, referring to the glottis/epiglottis area responsible for phonation) is the gate for voice production. If violent cold qi lodges in the epiglottis, causing it to become cold, the ability to produce sound is lost, resulting in sudden aphonia (loss of voice). The condition of being unable to speak refers to the inability to emit sound, not to trismus (lockjaw).

Trismus (lockjaw) in infants suffering from Wind Stroke occurs because wind has invaded the sinews of the mandible and cheeks. The sinews of the three Yang meridities of the hand converge at the mandible and cheeks; the sinews of the Foot-Yangming Meridian ascend alongside the mouth. Due to deficient cutaneous pores, wind-cold invades the sinews of the various Yang meridians. The sinews contract and tighten due to cold, leading to dysfunction of the joint mechanisms and resulting in trismus.

Facial deviation (crookedness of the mouth and eyes) in infants with Wind Stroke is also caused by wind invading the sinews of the mandible and cheeks. The sinews of the Foot-Yangming Meridian ascend alongside the mouth, while the meridians of the Hand-Yangmeridities on one side become tense, causing facial deviation.

The disease of Wind Spasm in infants resembles epilepsy but is characterized by rigidity and straightening of the back, spine, neck, and nape. This indicates that wind has injured the Taiyang Meridian (Taiyang Disease). Additionally, if the umbilical wound in an infant has not yet healed after birth and is exposed to wind, it can all induce spasm.

Emaciation and failure to gain flesh are all due to disharmony of the Spleen and Stomach, leading to poor appetite. Consequently, Blood and Qi become deficient and fail to nourish the skin and muscles. Whether the fetus encounters cold during gestation, or the newborn harbors latent heat after birth, both conditions impair the infant's ability to eat, leading to emaciation. Those with latent heat present with elevated temperature, body heat, and slightly yellowish muscle tone; those with latent cold present with intermittent diarrhea and bluish lips and mouth corners.