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In children whose blood and qi are both abundant, the fu organs are all full, thus heat generates in the stomach. The presentation includes: yellow stools, robust limbs, and a generalized fever that is palpable to the touch.

When children have solid zang-fu organs and abundant blood and qi, there is heat in both the interior and exterior, leading to distress from irritability and restlessness, as well as hot skin.

When children have abundant blood and qi, heat generates within the zang-fu organs. Heat causes dryness of the zang organs, resulting in thirst.

Infantile Ke Wu (Guest Intoxication) occurs when a child with weak Shen Qi (Spiritual Energy) is suddenly exposed to unusual objects or unfamiliar people, causing a clash with ghostly or spiritual energies, thereby inducing disease. This condition is called Ke Wu, also known as Zhong Ke or Zhong Ren. Its manifestations include vomiting and diarrhea of green, yellow, or white substances, separation of water and food undigested, severe abdominal pain causing the body to arch backward and twist contortedly, and facial complexion changing among five colors. The presentation resembles Epilepsy (Xian Bing), but without upward rolling of the eyes; the pulse is wiry, rapid, and frequent. If treatment is delayed, it becomes difficult to cure later. If the wet nurse has consumed excessive alcohol, breastfeeds while intoxicated, or after sexual exertion and panting, the condition is most severe and can be fatal to the infant.

When a child’s Shen Qi is weak and Jing Shuang (Essence and Spirituality) is slightly emaciated, the Hun and Po (Soul and Corporeal Soul) may be possessed by ghosts. The presentation involves unknowingly suffering from other ailments, manifesting directly as sallow complexion, frequent loud crying and calling, and persistent foul breath odor.

Sudden death in infants results from encountering "Three Deficiencies" combined with invasion by Thieving Wind (Zei Feng). Thus, death occurs abruptly without prior obvious illness. The "Three Deficiencies" are: first, coinciding with a year of declining annual luck; second, encountering the time of the new moon (emptiness); third, deviating from the harmonious climate of the season. When these three deficiencies exist, and the individual is further injured by Thieving Wind, Yin Qi becomes excessively depleted internally, while Yang Qi is blocked externally, causing stagnation and closure. With unblocked communication between Yin and Yang, sudden cessation of breath and death occur. If the zang-fu essence has not completely exhausted, revival may occur after a long period; some cases involve concurrent ghostly/spiritual energy, where survival depends on the retreat of the pathogenic factor after a short interval.

For those who suffer from Ke Wu or Zhong E (Evil Invasion) with sudden death, if the pathogenic qi is not fully expelled and remains stagnant in the heart and abdomen, it may trigger later attacks, often developing into Zhu Bing (Casting Disease/Chronic Infectious Disease).

Zhong E (Evil Invasion) in children refers to ghostly or evil qi striking the person suddenly. Regardless of age, if Yin and Yang follow their proper order, Ying and Wei (Nutritive and Defensive Qi) are harmonious, and the Shen is secure, Zheng Qi (Upright Qi) remains strong, and pathogens cannot invade. However, if Jing Qi is weak, one will be struck by ghostly toxicity and evil qi. The presentation begins with no prior illness, followed suddenly by stabbing pain in the heart and abdomen, severe oppression, confusion, and a sensation of impending death. In Zhong E, if the abdomen is distended and full, and the pulse is tight, large, and floating, the prognosis is poor (death); if the pulse is tight, fine, and faint, the prognosis is good (survival). If residual pathogenic force remains stagnant between the zang-fu organs and reactivates, it transforms into Zhu Bing.