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Shixian Decoction (Ten Immortals Decoction) (transmitted by Sun Shuangquan, a court attendant): Treats residual toxins after smallpox/rubella.
Bupleuri Radix (Chaihu), Puerariae Lobatae Radix (Gegen), Scrophulariae Radix (Xuanshen), Coptidis Rhizoma (Huanglian), Scutellariae Radix (Huangqin), Gardeniae Fructus (Zhizi), Citri Reticulatae Pericarpium (Chenpi), Poria (Fuling), Aurantii Fructus Immaturus (Zhiqiao), Rehmanniae Radix Recens (Shengdi).
The above herbs are coarsely crushed. Decoct with fresh ginger and take orally.

Another prescription (transmitted by Jia Nongfeng): Treats children who, after recovering from smallpox/rubella, exhibit coughing, abdominal distension, rapid breathing, irritability, diarrhea, hoarseness, and cyanosis of the lips and mouth.
Coptidis Rhizoma (Huanglian), Scutellariae Radix (Huangqin), Forsythiae Fructus (Lianqiao), Scrophulariae Radix (Xuanshen), Anemarrhenae Rhizoma (Zhimu), Platycodonis Radix (Jiegeng), Armeniacae Semen Amarum (Xingren), Paeoniae Radix Alba (Baishao), Ephedrae Herba (Mahuang), Arctii Fructus (Niubangzi), Puerariae Lobatae Radix (Gange), Citri Reticulatae Pericarpium (Chenpi), Magnoliae Officinalis Cortex (Houpo), Glycyrrhizae Radix et Rhizoma (Gancao).
The above herbs are coarsely crushed. Decoct with water and take orally.

Sores, carbuncles, ulcers, and boils all arise from the obstruction of Qi and Blood, irregular emotions (excessive anger or joy), unregulated diet, and inability to adapt to cold and heat. These factors cause the Qi of the Zang and Fu organs to stagnate internally, leading to a disorder of Yin and Yang and the stasis of Qi and Blood. There are also cases where long-term consumption of hot and dry cinnabar-stone pills causes deep accumulation of heat-toxin, resulting in sores and carbuncles.
This disease mostly occurs in people of wealth who consume rich and fatty foods. Due to their sedentary lifestyle, lack of labor, and unrestrained desires, deficient pathogens and internal heat attack the body, boiling the Qi and Blood to form these lesions.
"Yong" (Carbuncle) means blockage; it is large, elevated, and belongs to the Yang aspect, generated by the Qi of the Fu organs. Its pulse is rapid and floating. "Ju" (Deep Abscess) means obstruction; it is flat, sinks inward, and belongs to the Yin aspect, formed by the Qi of the Zang organs. Its pulse is deep and rapid. "Chuang" (Ulcer/Sore) is the general term for these conditions. "Jie" (Boil) is a small sore with a head.
The Classics state: "All pain, itching, and sores belong to Heart Fire." Because the Heart governs Blood and moves Qi, if Qi and Blood become stagnant and are combined with the heat of Heart Fire, conditions such as carbuncles and deep abscesses arise.
However, the depth of pathogenic invasion varies, so the severity and size of the lesions differ. When accumulated heat in the Fu organs surges outward into the muscles, the onset is sudden and severe, with swollen, shiny, soft skin and a wide area of involvement; this is a Carbuncle (Yong). When wind-toxin and accumulated heat from the Zang organs attack the muscles, the onset is fierce and malignant, starting as a single lesion resembling a nodule, white, scorched, and dry, causing pain that radiates to the heart upon touch; this is a Deep Abscess (Ju). When heat erupts between the skin layers causing swelling, with a small base not exceeding two or three cun; this is a Boil (Jie).
Carbuncles arise in the Fu organs, like a prairie fire spreading outward to ulcerate muscles; deep abscesses arise in the Zang organs, deep and difficult to treat, like embers in a clay oven corroding bones and marrow internally. Carbuncles are easier to treat but heal slowly due to difficult nursing; deep abscesses are harder to treat but recover more easily.
Among all sores, back carbuncles and Ding sores (hard boils) are the most urgent. Next are brain carbuncles, intestinal abscesses, and throat abscesses, which are also emergencies. Conditions such as scrofula, hanging sores, hemorrhoids, and fistulas can be treated with a slower approach. Skin diseases like tinea, leprosy-like sores, and pediatric malnutrition sores, although classified as sores, vary in severity and urgency.
For sores and carbuncles, one must distinguish deficiency/excess, cold/heat, and severity, prescribing medication accordingly without losing the correct sequence. For individuals over forty years old, any sore or boil on the crown, temples, chin, back spine, waist, ribs, or over tendons and bones—even in areas out of direct sight—must not be neglected. If ignored as a trivial ailment, many die as the condition worsens from mild to severe. Immediate treatment is necessary for salvation. This is akin to fighting a fire: it is easy to extinguish when just started, but impossible once it becomes an uncontrollable blaze. The principle is the same.
When a sore has not yet ruptured and toxin attacks the Zang and Fu organs, absolutely no hot-natured medicines should be used. If it has already ruptured and the Zang and Fu organs are depleted, with inability to eat, absolutely no cold-natured medicines should be used. This is the key to mastering the sequence of treatment.
There are Five Good Signs and Seven Bad Signs in sores that must be distinguished.
Five Good Signs:
1. Calm breathing and rest, appetite present.
2. Regular bowel movements and urination.
3. Pus drains, swelling subsides, color is bright and odorless.
4. Clear spirit and bright eyes, clear voice.
5. Harmonious body and breath.
Seven Bad Signs:
1. Irritability with cough, severe abdominal pain and thirst, unlimited diarrhea, urine scanty and burning like strangury.
2. Massive discharge of pus and blood, intensified pain, foul odor repulsive to others.
3. Rapid, coarse breathing and shortness of breath, mental confusion and lethargy.
4. Lesion turns black and sinks before rupture, face blue, lips dark, fecal incontinence.
5. Stiffness in shoulders and neck, heaviness in limbs.
6. Inability to eat, vomiting after taking medicine, loss of taste.
7. Hoarse voice, sallow complexion, cyanosis of lips and nose, edema of face and limbs.
Additional bad signs include belching and chest fullness, coughing with cold limbs, spontaneous sweating at random times, dizziness, deafness, mental confusion, palpitations, and incoherent speech.
If three of the Five Good Signs appear, the prognosis is good. If four of the Seven Bad Signs appear, the condition is critical. If all Five Good Signs are present, the patient will be safe. If all Seven Bad Signs are present, death is inevitable.