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Wu Ding (Five Types of Ding Sores) are all caused by emotional disorders such as anger, joy, worry, and overthinking; exposure to cold and heat; indulgence in strong wine; excessive consumption of sweet, fatty foods, poisonous fish, and vinegar sauces; and sexual excess.

These toxic pathogens accumulate, infiltrate, and ulcerate the Zang-Fu organs. If they are not dispersed for a long time, they eventually transform into Ding sores. There are five names: one is Bai Ding (White Ding), two is Chi Ding (Red Ding), three is Huang Ding (Yellow Ding), four is Hei Ding (Black Ding), and five is Qing Ding (Green/Blue Ding).

Bai Ding arises below the right nostril. Initially, it is like a millet grain, with a red root and white head. The area may feel numb or experience pain and itching. It causes aversion to cold and heaviness of the head, resembling Taiyang disease (a syndrome caused by pathogenic invasion of the Taiyang channel). The patient loses appetite, feels stifling oppression in the chest and diaphragm. If panting, shortness of breath, and mental confusion occur, death ensues; if these severe symptoms are absent, it is treatable. This disease will inevitably bring disaster within five days, so prompt treatment is required.

Chi Ding is located under the tongue. Both the root and head are red. It develops pain, the base of the tongue becomes stiff making speech difficult, accompanied by fright, irritability, mental depression, and trance-like states. The patient suffers from extreme thirst, drinking water incessantly, and urinary retention. If mania occurs, death ensues; if absent, it is treatable. Disaster will inevitably occur within seven days. Both adults and children can suffer from this.

Huang Ding arises at the edge of the lips and gums. Its color is yellow, containing yellow fluid. Upon eruption, it causes polyphagia followed by vomiting, numbness of the hands and feet, continuous salivation, abdominal distension, and irritability. If the patient sleeps excessively yet cannot rest properly, death ensues; if absent, it is treatable.

Hei Ding arises in front of the ear. It resembles a scar, is black in color, and varies in length. It causes lockjaw, insensitivity or numbness in the lower back, spine, legs, and knees. Otherwise, illness also occurs. Death will inevitably happen within three years. This is due to the gradual exhaustion of Kidney Qi. One should be cautious regarding sexual activities.

Qing Ding arises below the eyes. Initially, it resembles a tumor or scar. The body is green/blue and hard as stone. It causes blurred vision, frequent fear and palpitations, and restless sleep. If prolonged without healing, it leads to blindness or loss of essence. Disaster will inevitably occur within one year.

The root of Bai Ding is the Lung; the root of Chi Ding is the Heart; the root of Huang Ding is the Spleen; the root of Hei Ding is the Kidney; the root of Qing Ding is the Liver. The manifestations of Wu Ding are among the most severe diseases and must not be overlooked.

As for the formation of Yong Ju (carbuncles and ulcers) and swelling sores, they are all caused by the accumulation and stagnation of toxic pathogens in the Five Zang and Six Fu organs, not merely by the obstruction of Ying and Wei (Defensive and Nutritive Qi). Their occurrence has specific locations, and their dominance has specific origins. For instance, eruptions on the throat and tongue stem from Heart toxicity; those on the skin and hair from Lung toxicity; those on the muscles from Spleen toxicity; and those on the bones and body from Kidney toxicity. Eruptions in the lower parts are Yin toxicity; those in the upper parts are Yang toxicity; those on the exterior are Six Fu toxicity; and those on the interior are Five Zang toxicity. Therefore, infections originating in the Five Zang organs are difficult to cure.

Furthermore, lesions near bones often present with cold signs, while those near deficient areas often present with heat signs. Lesions near bones that do not heal for a long time may transform into Xue Gu (Blood Gu, a condition characterized by abdominal masses and bleeding). Lesions near deficient areas that do not heal for a long time may transmit Qi dysfunction, forming Lou (fistulas). Conditions developing into Gu typically feature more itching than pain, or itching preceding pain. Fistulas typically feature more pain than itching, or neither pain nor itching. Internal deficiency with external excess usually presents with more pain than itching. Uncontrolled hemorrhage often leads to death, whereas the rupture and discharge of pus often lead to survival. Some patients experience uncontrolled vomiting and irregular eating habits, all of which are consequences of Yong Ju. There are myriad variations in symptoms, but the key lies in clear and detailed differentiation.