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This is due to the large intestine being deficient, with toxic heat qi rushing against the anus, causing sudden pain in the lower part, and in severe cases, pain like bird pecking.

This refers to a condition where the illness has alleviated, but the five zang organs remain deficient, the exogenous pathogenic factors have not yet dispersed, and the true qi has not recovered; therefore, there remains residual heat resembling malaria in the morning and evening. This is not a genuine excess heat, but merely an invading heat pathogen.

This refers to a state after sweating, vomiting, or purging therapies, where the fu and zang organs are empty, body fluids are exhausted, and there is residual heat in the kidney, leading to thirst.

Wei qi (Defensive Qi) travels through the yang aspects during the day and the yin aspects at night. Yin governs the night, and night governs sleep; when yang qi is exhausted and yin qi is abundant, the eyes close for sleep. Now, since the heat pathogen has not yet dispersed and merges with the various yang meridians, yang becomes excessively strong while yin becomes relatively deficient. Although the patient is weak post-illness, they still cannot sleep because yin qi has not returned to its original state.

The person's blood and qi were previously deficient, and they were subsequently struck by deficient pathogens. After sweating, vomiting, or purging, the meridians and collaterals were damaged, yin and yang qi were exhausted, and the heat pathogen had just dispersed. The true qi was still scarce, the five zang organs remained deficient, the grain spirit (Spleen/Stomach digestive function) had not recovered, and there were no body fluids to nourish the body, resulting in emaciation and illness.

This is because the Yangming and Taiyin meridians were affected. After purging therapy, the internal heat was cleared, but the Spleen and Stomach became deficient and cold, and the grain qi had not recovered, leading to an inability to eat.

All yang meridians are on the exterior. When yang qi is deficient, spontaneous sweating occurs. The Heart governs sweat; if the Heart is deficient, body fluids will flow out recklessly.

If there is initially blood stasis accumulation internally, and upon contracting a cold damage disease, heat pathogens clash with long-standing blood stasis, fever and mania-like symptoms occur; if cold pathogens are present, there is fullness in the lower abdomen, and urination is surprisingly free, indicating blood stasis. Purging therapy is appropriate. A deep and knotted pulse confirms the diagnosis of blood stasis.

The Liver opens into the eyes. When Liver qi is deficient, heat pathogens rush upward into the eyes due to deficiency, causing redness and pain in the eyes; in severe cases, sores, nebulae, white membranes, or fleshy growths may develop.

This is due to toxic heat qi emerging from within and attacking the hands and feet along the meridians. The Jing-Well, Ying-Spring, and Shu-Stream acupoints of the five zang and six fu organs all emerge from the fingers and toes; thus, toxins exit from the zang and fu organs.

When both yin and yang are deficient, damp-toxic qi clashes with wind-heat, causing Wei and Ying qi to become stagnant. When Wei and Ying qi are stagnant, blood and qi do not circulate freely; when blood and qi do not circulate, pathogenic heat causes obstruction, leading to flowing swellings along the affected meridians.