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The term "Wu Fa" (Five Eruptions) refers to carbuncles and sores occurring on the brain, back, eyebrows, beard, and temples. Generally speaking, they are divided into three grades: first, Ju (deep-seated suppurative infection); second, Yong (superficial abscess); third, Jie (furuncle).

When a Ju first appears, it is as small as a millet seed, with varying sensations of itching and pain. If accidentally touched and broken, the lesion spreads to the surrounding areas, presenting with redness, swelling, heaviness, and dullness, radiating pain to the hypochondrium; after several days, one gradually feels intense heat in the skin and muscles, aversion to cold, restlessness, and thirst, with the swelling expanding, exuding serous fluid, failing to ulcerate for many days, and bleeding upon pressure; this is called "Fa Bei Ju" (Back Carbuncle). Those occurring on the brain are called "Nao Ju" (Brain Carbuncle); those occurring on the temples, eyebrows, and beard are named by analogy to their location.

There is another type that initially presents without a distinct head, with swelling spanning three or four cun, initially feeling heavy and painful; after lingering for several days, the skin becomes smooth and soft; if severe, it also causes fever, aversion to cold, headache, restlessness, and thirst; this is called "Fa Bei Yong" (Back Abscess).

There is yet another type that initially presents with a single head, floating red color without deep-rooted swelling, appearing between the skin layers, sized one or two cun; this is called "Jie" (Furuncle). Among these three conditions, only the Ju is the most severe.

The onset of this disease is generally caused by rich dietary flavors and wearing thick, warm clothing. Wearing dense and warm clothes makes the exterior susceptible to cold pathogens; consuming too many rich flavors generates internal heat in the five zang organs. Accumulated heat in the zang and fu organs impedes blood circulation, causing toxic factors to stagnate and evil qi to linger. Heat combats the blood, leading to blood stasis, which causes muscle decay and forms sores: superficial ones become Jie, solid ones become Yong, and deep ones become Ju.

Some suffer from this disease due to the activation triggered by ingesting mineral drugs (Jin Shi), while others have suffered from it throughout life due to taking such drugs. This is likely because ancestors once ingested these substances, and their toxicity has been transmitted to descendants.

If the disease is identified as a Ju at its onset, prompt treatment is required. For individuals with strong constitution, urgently administer Wu Xiang Liao Qiao Tang (Five-Spice Forsythia Decoction) or Lou Lu Tang (Rhaponticum Decoction). For those under fifty years old with robust constitutions, Wu Li Da Huang Tang (Five-Benefits Rhubarb Decoction) or Hua Du Wan (Toxin-Resolving Pill) may be taken to promote bowel movement and clear the zang-fu one or two times. Apply Zhui Du San (Toxin-Pursuing Powder) to the sore head, paste with warm ointments, and wash with Xiao Zhong Tang (Swelling-Reduction Decoction) and Kui Du Tang (Ulceration-Decomposing Decoction). Treat thusly until pus matures. Before this stage, do not use various medicines to forcibly treat it, in order to calm the patient's mind; strictly avoid irritation. Once the pus matures, breaks down, and ulcerates, take Wu Xiang Tang (Five-Spice Decoction), Nei Tuo Li San (Interior-Supporting Powder), Fu Ling Tang (Poria Decoction), or Dang Gui Tuo Li San (Angelica Interior-Supporting Powder). If thirst persists, take Zhu Ye Shi Gao Tang (Bamboo Leaf and Gypsum Decoction) or Ru Xiang San (Frankincense Powder); do not administer bitter-cold drugs like Da Huang (Rhubarb) and Po Xiao (Mirabilite) for excessive heat. If diarrhea continues indefinitely due to purgatives, death ensues.

If foul flesh remains in the sore and pus drainage is poor, immediately apply cauterizing/erosive medicines or use setons for drainage, and apply Lu Jiao San (Deer Horn Powder) pasted with vinegar above the area. After foul flesh is removed and healthy flesh begins to grow, apply Sou Nong San (Pus-Searching Powder) or Cui Xia San (Emerald Cloud Powder). If toxic factors within the sore are not fully cleared, do not close the wound prematurely; avoid applying flesh-generating medicines early; even if it temporarily heals, it will inevitably recur. The sequence of regulation must be adapted to the specific situation, focusing on nursing care and precautions.