Shingles (Herpes Zoster)
Overview
Shingles is reactivation of the varicella-zoster virus, causing a unilateral, band-like, painful burning rash with clustered vesicles on a red base along a nerve distribution, often preceded by tingling or pain; after the rash heals, some people, especially older adults, develop prolonged postherpetic neuralgia. Chinese medicine names it 'snaking string sore' (she chuan chuang), attributing the acute phase to liver-gallbladder damp-heat or toxic heat, some cases to spleen dampness, and residual pain to qi stagnation with blood stasis. Antiviral treatment is most effective when started within about 72 hours.
TCM disease & pathogenesis
TCM calls this 'snaking-string sore' (she chuan chuang) or 'girdling fire cinnabar', marked by clustered vesicles wrapping around the waist with burning stabbing pain. The site is the skin collaterals, linked to liver and spleen. Emotional upset, faulty diet, or deficient righteous qi allows damp-heat to accumulate in liver-gallbladder and dampness to arise from impaired spleen transport; seasonal toxic evil then joins it, and damp-heat fire-toxin steams outward along the meridians, obstructing qi and blood to produce red clustered vesicles and searing pain. Dampness is sticky and lingering while fire is urgent, hence weeping and intense pain. After the rash, lingering toxin with qi stagnation and blood stasis blocks the collaterals and causes prolonged neuralgia. The acute phase drains liver-gallbladder damp-heat and cools blood-toxin; residual pain moves qi, quickens blood, and frees the collaterals; antiviral treatment should start early (within about 72 hours).
Pattern differentiation (clinical patterns)
Liver-Channel Fire-Toxin (Acute)
Bright red hot clustered vesicles with burning stabbing pain, bitter mouth and dry throat, irritability, red tongue with yellow coating, wiry rapid pulse.
Drain liver-gallbladder fire; resolve toxicity and stop pain.
Spleen Deficiency with Dampness
Pale clusters of vesicles with weeping erosions and relatively mild pain, poor appetite and abdominal bloating, loose stools, pale tongue with white greasy coating, soggy pulse.
Fortify the spleen and drain dampness; clear heat and resolve toxicity.
Qi Stagnation with Blood Stasis (Postherpetic Neuralgia)
Persistent fixed stabbing pain long after the rash heals, worse at night, dark tongue with stasis spots, rough pulse.
Quicken blood and transform stasis; move qi and stop pain.
Connections
Daily care & prevention
Seek medical care promptly at the first rash or pain (antivirals work best early); keep lesions clean, dry, and covered, avoid scratching and contact with pregnant, newborn, or immunocompromised people who lack immunity, and rest. Press Hegu (LI4), Taichong (LR3), Quchi (LI11), Yanglingquan (GB34), Xuehai (SP10), and Sanyinjiao (SP6). Rash near the eye, ear, or face needs urgent care.
When to seek medical care
Seek urgent care for rash on the nose tip, around the eye or forehead (risk to vision), ear rash with facial weakness or hearing loss, widespread rash in pregnancy or weakened immunity, severe headache or confusion, or pain that is unbearable.