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The *Classic of Medicine* states: The feet are governed by the Foot-Yangming Stomach Meridian. Cold pathogens arise from below; therefore, it is essential to keep the feet warm.

The *Classic of Medicine* states: The head is the convergence point of the six Yang meridians, where all Yang channels assemble. The head is also the "Sea of Marrow." If excessive heat occurs in the head, marrow may overflow and sweat may leak profusely, or the fontanelle may swell, or the cranial sutures may separate, or sores on the head and eye diseases may arise. As the common saying goes, "the head should not be cooled," thus the head is suited to remain cool.

The Heart belongs to Bing Fire (Yang Fire). If external pathogenic heat invades and internal Heart fire connects with it, both interior and exterior will become hot. Mild symptoms include dry mouth, dry tongue, reddening of the cheeks, and flushed face; severe symptoms include crying, jumping, and fright. Therefore, the Heart is suited to remain cool.

If a child suddenly sees unusual objects, unfamiliar people, hears chickens crowing or dogs barking, suddenly sees cattle or horses, or is frightened during play, or suddenly hears a loud noise, leading to convulsions, this is due to the deficiency of Heart Qi causing the dispersion of spirit and mind. Treatment should employ herbs that tonify the Heart and benefit Qi. If sedative and heart-calming herbs such as Niuhuang (Calculus Bovis), Zhusha (Cinnabaris), Hupo (Succinum), Jinyin (Gold and Silver foil), Naobing (Borneolum Syntheticum), Shexiang (Moschus), and Shuiyin (Hydrargyrum) are used, it may result in slow convulsive disease (Man Jing Feng), leading to abdominal distension and cold feet, rendering the condition incurable.

The *Classic of Medicine* states: Spleen is referred to as "Huang Po" (Yellow Matron), and Stomach as "Jin Gong" (Golden Duke); they are responsible for nourishing the five Zang and six Fu organs. If the Spleen and Stomach are firmly established, then body fluids circulate freely, Qi and Blood flow smoothly, the exterior and interior are harmonious, and the whole body remains healthy. Since Spleen and Stomach belong to Earth and dislike dampness, when infants undergo "bian zheng" (physiological changes during growth), they may exhibit swelling of the upper lip, fever in the head, or qi rebellion with body heat. Parents who do not understand this may mistakenly treat it as Taiyang disease (Cold Damage) or food stagnation, using diaphoretic drugs to induce sweating, purgative drugs to drain downward, cooling drugs to calm the Heart, or hot water baths to shake off chill. This leads to imbalance of cold and heat, internal injury to the Spleen and Stomach, and pathogenic factors combing with the Large Intestine, resulting in clear-colored stools. If prolonged, vomiting will occur; if vomiting persists, convulsions will follow. When convulsions occur, it is often said that extreme heat generates wind, leading to the use of cooling drugs. This further damages true Qi, and many cases become irrecoverable. The classics state: When Spleen Earth is weak, Liver Wood overacts upon it, causing tendon spasms and convulsions. Treatment should employ drugs that tonify the Spleen, warm the Stomach, and promote the free flow of Qi, thereby offering a chance of survival.

When a fetus is in the womb, if the mother excessively seeks coolness, cold qi enters the fetal sac. After birth, if the infant is fed milk or food while still crying from grief without having settled, the Qi and food accumulate and knot in the middle jiao. Over time, this fails to dissipate, injuring the Spleen and Stomach. Mild cases present with regurgitation of milk and green stools; severe cases present with borborygmus in the abdomen, qi rebellion, and overflowing saliva, making treatment difficult.