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According to *Zhu Bing Yuan Hou Lun* (Treatise on the Pathogenesis and Symptoms of All Diseases): Fugu Ju (Bone-attaching Carbuncle) occurs when wind pathogens invade the bone joints while the body is hot. Wind and heat contend with each other, and are further compounded by cool dampness; or it results from sleeping outdoors in autumn and summer, being constrained by cold dampness, causing wind-heat to lie latent and knot together, obstructing and attaching to the bones to form a Ju (deep-seated abscess). This condition favors the large joints. In men, postpartum women, and women generally, it often affects the Shuxi region (inguinal area), the head of the ilium, and between the thigh and knee. Infants and young children may also develop it on the upper arm, elbow, or back. In elderly patients with acute cases, pain is felt first, accompanied by immobility; pressure elicits pain radiating to the bone. After a few days, the skin and muscles feel slightly tight, swelling up like obesity; this is characteristic. For infants who cannot speak, crying upon being held close indicates joint pain, which is a sign. In elderly patients with chronic cases, one initially feels swelling and fullness; after a few days, numbness and pain with limited mobility appear. Infants may show asymmetry in limb movement, appearing stiff; examining the joints reveals swelling. If unrecognized as Fugu Ju, it may lead to generalized suppuration, death without ulceration, and the whole body turning cyanotic and dark. Some elderly patients do not recognize Fugu Ju, misidentifying acute cases as Zeifeng (Thief Wind) and chronic cases as Fengzhong (Wind Swelling). Failing to realize it is a Ju leads to death.

*Duangju Fang* (Short Drama Prescriptions) states: Fugu Ju is also called Ting Ju (Shin Bone Abscess), because it lacks a head and attaches to the bone forming pus. It is also called Yong Ju (Carbuncle and Ulcer) due to its extensive nature, involving pus throughout the body. Acute Fugu Ju resembles Zeifeng closely. Fugu Ju arises from excessive internal heat combined with long-term exposure to wind-cold, allowing wind to enter the bone joints where it contends with heat. Initial symptoms include drowsiness, heaviness, and confusion (Hu hu, meaning trance-like state). Acute cases have more heat and less wind; chronic cases have more wind and less heat. Zeifeng occurs in people with normal constitution and no heat, struck suddenly by violent wind-cold, causing deep bone pain. Long-standing Fugu Ju presents with swelling and suppuration. Long-standing Zeifeng leads to wasting and emaciation, or formation of Luoli (scrofula). This distinguishes them. Treating Fugu Ju as Zeifeng deepens the disease and increases pus; treating Zeifeng as Fugu Ju exacerbates cold-wind, potentially leading to Luoli, hemiplegia, and contractures.

Acute Fugu Ju features intense heat at the painful site, alternating chills and fever, shivering aversion to cold, intolerance to heat, reddish urine, difficult defecation, and anhidrosis. Immediate treatment involves clearing heat and purging, which resolves the condition. Even if not fully resolved, it becomes superficial and easier to ulcerate, ceasing to attach to the bone. Zeifeng manifests as bone pain that worsens with pressure or looking up, without intense heat, with body numbness, alternating chills and fever, feeling cold internally. Applying heat provides slight relief, sometimes with sweating. Treatment includes acupuncture, moxibustion, warming therapy, and administering warm wind-dispelling herbs for efficacy. Upon initial onset of Fugu Ju, administer Loulu Tang (Rhapontic Rhizome Decoction) to purge, and apply Xiaodou San (Adzuki Bean Powder) to resolve swelling. If purging causes deficiency but swelling persists, remove Dahuang (Rhubarb Root) and use Sheng Dihuang (Fresh Rehmannia Root) and Gan Dihuang (Prepared Rehmannia Root). As heat subsides but residual wind remains, take Wuxiang Lianqiao Tang (Five-Aromatic Forsythia Decoction), removing Huanglian (Coptis Rhizome). If residual heat remains, apply Shengma Gao (Cimicifuga Ointment). If time is lost and suppuration forms, use Huozhen Gao San (Fire-needle Ointment/Powder) following carbuncle treatment protocols. (Note: Loulu Tang and Shengma Gao are in Volume 17 for treating Dan toxicity; Wuxiang Qiao Tang is in Volume 16 for treating Ehexiong swelling; all from *Duangju Fang*.)

*Qianjin Fang* (Essential Prescriptions Worth a Thousand Gold) states: To distinguish Fugu Ju from Zeifeng, Fugu Ju begins with pain only, before swelling appears; Zeifeng also causes pain without heat, whereas Fugu Ju presents with intense heat above the affected area.

Upon initial onset of Fugu Ju, urgently administer Loulu Tang to purge. Apply Xiaodou San to resolve swelling; Wuxiang Lianqiao Tang may be taken.

Prescription for treating Gu Ju (Bone Abscess):
Another prescription: Grind Wu Jingzi (Brassica Juncea Seed) into powder, apply externally, wrap with silk, change once daily.

*Ge Shi Fang* (Ge's Prescriptions) for chronic Fugu Ju persisting for years, recurring annually with draining exudate that fails to heal:
Melt Yi (Maltose) by fire and pour into the wound, three times daily.
Another prescription: Apply Baiyang Ye Xie (Populus Alba Leaf fragments) externally.