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Jingfeng (Wind-Convulsion) is a general term. Infants and young children have insufficient Heart Qi, their wisdom and will are often subdued, their spirit is vague and unstable, failing to reside within the body; they fear others and objects, gradually developing terror and dread. When terror and dread reach an extreme, they transform into fear; when fear is excessive, it leads to palpitations and inner unrest (Zhengsong); prolonged Zhengsong naturally results in startled astonishment (Ti'e). Once Ti'e occurs, if convulsions (Yong) follow, this is a condition arising from insufficient Heart Qi, differing only in severity.

Furthermore, due to weak Heart Qi, sudden exposure to fright causes illness not gradually but immediately: the face turns cyan and lips pale, eyes stare fixedly without seeing clearly, hearing becomes dull with no sound perceived, spirit scatters instantly, and mental faculties are completely lost. After a long while, they slowly recover. These are diseases caused by Wind-Fright invading the deficient areas of the five zang and six fu organs, as previously discussed.

However, infants often develop Jingfeng gradually because improper breastfeeding by the mother consumes their Heart Qi. Generally, injuries from fire or water cause Palpitations (Ji); falls and bumps cause Fear (Kong); contact with people or objects causes Startled Astonishment (E); when fear and astonishment do not dissipate,郁闷 (depression/stagnation) accumulates in the chest, leading to Zhengsong. Thus, accumulated Jingfeng is difficult to dissipate because it cannot resolve itself; whereas Kong and Ji are self-aware, so they do not form accumulations. Moreover, feelings of terror and dread often linger within, unable to be discharged on one's own; occasionally triggered by emotional stagnation affecting the Heart... The Liver governs Wind, the Spleen generates Phlegm, the Lungs produce Heat, and the Heart generates Fright. These four symptoms occur sequentially; in severe cases, the first symptom appears suddenly. For instance, thunderclaps may be loud yet harmless, why? Because the sound corresponds to the emotion without causing injury. However, when a child is in a secluded place or a temple, harboring fear, and is suddenly teased by ignorant people shouting "Ghost coming!", with no way to escape, the Qi of Fright enters the Heart. If this Fright Qi is not quickly resolved, within moments the fingernails turn black and lips/mouth turn cyan, resulting in severe harm that is incurable.

Since ancient times, treating infants has been the most difficult task, relying entirely on herbal medicine for recovery. Jingfeng is extremely difficult to treat; Slow Jingfeng is even harder; Slow Spleen syndrome is critical. Herein, I excerpt the most difficult syndromes requiring infant care, which are unbearable and hard to treat either before or after onset. Perhaps ancient physicians' intentions were incomplete, or later generations failed to understand previous works. Now, I detail the origins and consequences, clarify benefits and harms, guide those lost on the right path, hoping to benefit scholars. This must be made easy for midwives and noble families to understand. If an infant's Yin and Yang are slightly imbalanced, following these principles for support prevents premature death. Studying this in leisure time aids practitioners in emergencies. One glance reveals the heart of this old practitioner: no hidden tricks, no artificial embellishments, no false modesty or concealed truths, but simply a desire to universally save lives, ensuring infants from birth to adulthood suffer no negligence in treatment, and illnesses do not cause harm, allowing them to laugh and play with full bellies. Mothers need not frown or sigh in sorrow, but remain content and at ease, avoiding repeated worries. How joyful! With sincere intent, all achieve physical well-being.