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Guest-heat arises from the disharmony of the internal organs, generating deficiency-heat. If guest-heat lodges in the Upper Jiao (Upper Burner), phlegm and excess accumulate in the chest and diaphragm, accompanied by a bitter taste in the mouth and dry tongue; if it lodges in the Middle Jiao (Middle Burner), there is vexation, mental distress, and fullness, with an inability to eat; if it lodges in the Lower Jiao (Lower Burner), there is difficulty in defecation and dark, scanty urination.

When deficiency pathogens reside internally and contend with Wei Qi (Defensive Qi), Yin excess manifests as cold. When Zhen Qi (True Qi) departs, deficiency ensues, leading to the generation of internal cold. Observing the five orifices, a pale complexion indicates cold. Palpating the pulse, a slow pulse indicates cold; a tight pulse indicates cold; a choppy and slow pulse indicates cold; a faint pulse indicates cold; a slow and moderate pulse indicates cold; a faint and tight pulse indicates cold; a deficient pulse at the Cun Kou (Radial Artery) indicates cold. Regarding treatments such as herbal decoctions, hot compresses, acupuncture, and stone therapy, there are specific formulas; nourishing and Daoyin (guiding and pulling) exercises are attached below.
The *Yangsheng Fang* (Prescriptions for Nourishing Life) · *Daoyin Fa* (Guiding and Pulling Methods) states: Step one foot firmly on the ground, extend the other foot forward fully, stretch to the utmost limit, position the palms towards the four directions, and alternate left and right twenty-eight times. This removes cold in the intestines, stiffness and distress in the waist and spine, and bone pain, allowing Qi and Blood to circulate and moisten throughout the body.
It also states: Join both feet together, grasp both feet with hands palm-up, pull upward vigorously, tilt the head backward, and stretch to the utmost limit, repeating twenty-one times. To exert force by straightening the toes, extend hands and feet outward, stretching the body and limbs to the utmost limit, repeating fourteen times. This removes various diseases in the orifices and deficiency-cold in the lower part of the body.
It also states: Assume a kneeling posture with legs spread, place hands backward supporting on the mat, lean back gradually, direct Qi forward from the abdomen until urgency peaks, then release, repeating fourteen times round trips. This removes cold below the navel, foot pain, and disharmony of the Zang and Fu organs.
It also states: Place hands backward supporting the waist, shrug shoulders and stretch to the utmost limit, turning the torso left and right, repeating twenty-one times round trips. This removes cold below the navel and abdomen, stiffness in both flanks, and disharmony in the chest and hypochondrium.
It also states: Assume a kneeling posture with one knee forward and one back, place hands backward with palms flat on the ground, exhale downward. Begin leaning down gradually, rise when severe distress in the waist and spine is felt, repeating fourteen times round trips. Keep the body upright, disperse Qi left and right, rotate the waist twenty-one times. This removes cold and distress below the navel, and pain within the Jiexi acupoint.

Yang deficiency leads to external cold, while Yin deficiency leads to internal heat. Yang excess leads to external heat, while Yin excess leads to internal cold. Yang receives Qi from the Upper Jiao to warm the skin and intermuscular spaces. Now, if cold pathogen remains outside, the Upper Jiao becomes obstructed; obstruction causes cold to remain exclusively externally, resulting in shivering. Internal heat generated by Yin deficiency occurs due to overwork, where form and Qi decline, Grain Qi is insufficient, the Upper Jiao fails to circulate, and the Lower Wan (Stomach outlet) is blocked. Stomach Qi becomes hot, steaming the chest, thus generating internal heat. External heat due to Yang excess arises because the Upper Jiao is not smooth, the skin is dense, and Cou Li (interstices) are closed, preventing Wei Qi from venting, thus causing external heat. Internal cold due to Yin excess occurs when Jue Qi (Rebellious Qi) moves upward, accumulating cold in the chest without discharge. Without discharge, warming Qi departs, leaving cold alone; blood coagulates and stagnates, blocking the vessels. Blocked vessels present as large and choppy pulses, resulting in internal cold. The essence of Yin and Yang lies in Yin being secure and Yang being firm. If they are not in harmony, it is like spring without autumn or winter without summer; therefore, harmonizing them is the sage's standard. Thus, if Yang is excessive and cannot secure Yin, Yin Qi will be exhausted.
Exposure to wind generates cold-heat disorders. Those with small bones and weak flesh are prone to cold-heat diseases.
Bone cold-heat disease involves restlessness and continuous sweating. Withering of the tooth roots requires treating the Luo-connecting vessels of the Foot-Shaoyin Kidney Meridian on the inner thigh; if teeth and nails wither, it is incurable death. Palpating the pulse reveals a deep, fine, rapid, and scattered quality.