Herpes zoster infection

Understanding Herpes zoster infection

The classical literature explains shingles as a visible eruption of heat and dampness that has been building beneath the surface, often for a long time.

The Liver channel runs along the sides of the ribcage, which is why the rash so often appears as a band across one side of the torso: that is the pathway where stagnant Qi and trapped heat are said to break through. Emotional stress and frustration are named as common triggers.

The acute picture is Damp-Heat in the Liver channel: bright red tense blisters along one side, with intense burning or stabbing pain, a bitter taste and irritability. A second acute picture is Spleen deficiency with dampness, where blisters are paler, thin-walled and weep clear fluid.

After the rash resolves, the tradition describes a third pattern, Qi and Blood stagnation, for the fixed stabbing pain that persists in the area of the healed rash. That is the pattern behind post-herpetic pain, and it is treated by moving Qi and Blood rather than by clearing heat.

Two things explain why the rash looks as it does: the pathway of the channel and the nature of the pathogen. The Liver channel runs up the sides of the trunk, so when Qi that has been stuck for weeks, and the heat it generated, finally break out, they come in a band that stops at the midline. The trigger is usually a stretch of strain, frustration or grief, which stalls Liver Qi until it ignites; that fire then mixes with dampness from rich food or from a body that already holds moisture, and the mixture becomes the hot, sticky toxin that blisters the skin.

Not every case is hot. Where the Spleen is weak, fluids are not transformed and dampness collects instead, so the blisters are pale, the walls are slack and they weep clear fluid, and the person feels heavy and bloated rather than irritable and hot. After the skin heals the process may continue quietly in the collaterals, where the earlier fire and dampness have left Qi and Blood stagnant. That is the fixed stabbing pain of post-herpetic neuralgia, and it is treated as its own pattern rather than as a leftover rash.

How it connects

Shingles rarely appears in isolation. The intense anger or anxiety that often precedes an outbreak is not coincidental: it reflects the Liver Qi stagnation that over time generates the Fire and Damp-Heat erupting as blisters along the channel, so treating the emotional root matters as much as clearing the skin. When the Spleen is weak, the rash comes with abdominal distention, poor appetite and heaviness, showing that digestive Dampness has spilled into the channels and that skin blisters and digestive sluggishness share the same root of Spleen deficiency failing to transform fluids. Even after the rash heals, lingering nerve pain is a direct continuation of the initial stagnation, as Fire and Dampness damage the collaterals and leave Qi and Blood stasis.

How it is assessed

Diagnosis looks at the rash, its distribution, and the pain that follows it.

What a practitioner looks for

• Distribution: a band on one side of the torso is the Liver channel picture described in the reference.
• Blister quality: bright red and tense points to Damp-Heat; pale and thin-walled points to Spleen deficiency.
• Pain: burning and stabbing at the outset, then fixed stabbing pain after healing, distinguishes the acute from the chronic pattern.
• Red flags: rash on the nose tip, near the eye, or with visual change needs immediate medical review.

The practitioner looks at the blisters before asking anything else. Their colour, the tension of the wall and whether they weep say more about the pattern than the size of the rash does. Bright red and tense with a burning pain points one way; pale, thin-walled and oozing points another. The timing matters just as much: whether the rash is still erupting, whether it is crusting, or whether the skin has healed and only pain remains, because the third stage needs a different strategy from the first two.

The accompanying signs decide the rest. Irritability, a bitter taste, dark scanty urine, a red tongue whose coat is thin and yellow or yellow and greasy, and a pulse that is wiry, slippery and rapid belong to Damp-Heat in the Liver Channel. Poor appetite, bloating, loose stools, a heavy body, a pale swollen tongue with teeth marks and a white greasy coat, and a soft slow or slippery pulse belong to Spleen Deficiency with Dampness. A dark purplish tongue with stasis spots and a wiry choppy pulse, with fixed pain that pressure aggravates, belong to the late pattern.

The distribution is checked for safety as well as for pattern. A rash on the nose tip, or one that reaches the eye, can involve the eye itself and needs same-day medical and ophthalmological review; a rash crossing the midline, a high fever with confusion or a severe headache, spreading redness with pus, and any shingles in someone immunosuppressed are medical problems first. Antiviral treatment works best inside seventy-two hours, so the practitioner will say so rather than begin with herbs.

TCM patterns in Herpes zoster infection

Three patterns are described, and they follow the illness rather than existing side by side. The first two belong to the erupting rash. Damp-Heat in the Liver Channel is the common acute picture: bright red, tense, fluid-filled blisters in a band on one side, with burning or stabbing pain, a bitter taste and a quick temper. Spleen Deficiency with Dampness is the other: paler, slack-walled blisters that weep clear fluid, with a bloated abdomen, poor appetite and loose stools, and a pain that sits as heaviness rather than burning. The third, Qi And Blood Stagnation, begins once the skin has healed, when the collaterals have been damaged and the pain stays fixed, stabbing and worse at night under a dark tongue and a choppy pulse. The blister wall and the state of the digestion separate the two acute pictures, and the presence or absence of a rash separates the third from both.

Treatment approach

How the tradition treats herpes zoster infection, with the herbs, formulas and points used for it.

Principles

• Clear heat and drain dampness in the acute rash, and involve medical care early - antivirals work best when started promptly.
• Move Qi and Blood for persistent pain after the rash has healed.
• Support the Spleen where blisters are pale and weeping.
• Protect the eyes: facial or nasal rash needs urgent review before any other treatment.
• Stage decides the emphasis. While the blisters are still forming, fire and dampness are drained from the affected channel with bitter cooling herbs and local needling around the rash, and antivirals are started without delay. As the skin crusts the focus turns to keeping Qi and Blood moving so that stagnation does not settle, and once pain is the only complaint the work is to invigorate blood and open the collaterals. Mixed pictures are common, and a weak Spleen can sit underneath a Liver fire outbreak, so two patterns are often addressed at once.

Herbs used

Formulas

• Long Dan Xie Gan Tang
• Wei Ling Tang
• Tao Hong Si Wu Tang

Acupoints

• LR-3 (Taichong)
• GB-34 (Yanglingquan)
• SJ-6 (Zhigou)
• ST-36 (Zusanli)
• SP-6 (Sanyinjiao)
• SP-9 (Yinlingquan)
• BL-20 (Pishu)
• SP-10 (Xuehai)
• LI-4 (Hegu)

What to expect

• The acute rash is described as settling over two to four weeks.
• Persistent pain after healing is the most common long-term issue and is treated as its own pattern.
• Early antiviral treatment shortens the illness, which is why medical review comes first.
• In the acute phase treatment is frequent, with needling every second day, or daily when the pain is severe, and herbs taken two or three times a day, and it reduces to once or twice weekly as the blisters dry. Blister healing comes first, then a stepwise fall in burning pain. Post-herpetic pain moves more slowly, easing week by week over four to eight weeks and sometimes several months, and the formula is changed as the picture shifts from heat to stagnation.

Safety and when to get help

For anything severe, sudden or spreading quickly, read when a skin problem needs urgent care.

Cautions

• Antiviral treatment works best started within 72 hours; do not delay it for herbal treatment.
• Shingles near the eye needs ophthalmological review even if the rash seems mild.
• People who are immune-suppressed need urgent medical assessment.

Using this alongside conventional care

• TCM is described as complementary to conventional care: antiviral treatment and pain control continue alongside herbs and acupuncture, and eye involvement is a medical emergency.
• Antivirals and pain relief continue alongside the herbs and needles, and both prescribers should hold the full list. Nerve-pain medicines such as gabapentin and pregabalin are not stopped abruptly; if the pain falls, the dose is tapered with the doctor who prescribed it. Blood-moving herbs including Hong Hua, Yan Hu Suo and Tao Ren can interact with warfarin, aspirin or clopidogrel, and anyone immunosuppressed by chemotherapy, transplant or HIV needs medical clearance before herbs are started.

Diet and lifestyle

• Avoid food that is said to create heat and dampness, since these are described as fuelling the outbreak and worsening pain. Light, cooling food is favoured during the acute phase.
• The shared rule is to avoid what makes heat and dampness, since both fuel the outbreak: spicy dishes, alcohol, coffee, fried food and too much sugar, with steamed food, congee and broths in their place. Cooling food such as cucumber, watermelon, mung bean and chrysanthemum tea suits the acute hot phase; where the Spleen is weak, warm cooked meals and cooked pear with Yi Yi Ren suit better than salad or chilled drinks; after the blisters have dried and pain lingers, hawthorn, peach kernel and turmeric gently move blood. Which of these applies depends on the pattern.

If you're pregnant

Shingles in pregnancy calls for extra caution. Tao Ren and Hong Hua, the blood-moving pair inside Tao Hong Si Wu Tang, are strictly contraindicated, and Long Dan Xie Gan Tang, being bitter and cold, may be harder on a developing fetus.

In practice the work falls to needling plus careful diet, with ST-36 (Zusanli) and SP-6 (Sanyinjiao) used cautiously to support the Spleen and clear dampness without risk. If the Spleen is deficient and dampness has collected, mild herbs drawn from Wei Ling Tang, such as Bai Zhu and Fu Ling, may be added under close supervision.

If you're breastfeeding

While breastfeeding, Long Dan Xie Gan Tang, and other bitter-cold formulas like it, are avoided, because their cooling nature may give the nursing infant diarrhoea or weak digestion. Wei Ling Tang is gentler, and diet does much of the work: congee cooked with Yi Yi Ren, for instance. Acupuncture is safe and does not affect milk.

If post-herpetic pain occurs, a small dose of Yan Hu Suo may help, but Tao Ren and Hong Hua are avoided.

If treating a child

In a child, shingles usually reflects Spleen deficiency together with damp-heat arriving from outside. Blisters tend to be slack rather than tense and often ooze. Doses are a fraction of the adult amount, usually one third to one half, and a strongly bitter herb such as Long Dan Cao is used cautiously.

Paediatric tuina and gentle or non-insertive needling are preferred, and food can help too: pear cooked lightly with Yi Yi Ren drains dampness without burdening an immature digestive system.

If treating an elderly patient

In older adults, post-herpetic neuralgia is the commonest and most disabling complication. Once the blisters dry, the Qi And Blood Stagnation picture is the one that dominates, sitting over an underlying deficiency of Kidney and Liver Yin. A formula such as Tao Hong Si Wu Tang is given at a lower dose, around two thirds of the adult amount, so that fragile Qi is not overstimulated.

Acupuncture is highly effective for the pain and safer than long-term analgesics, but courses run longer, and nourishing the root in the Kidney and Liver matters for preventing recurrence.

Urgent-sign guidance is based on standard sources: NHS anaphylaxis, NHS cellulitis, NHS Stevens-Johnson syndrome, NHS melanoma.

Related conditions

Conditions that often coexist with herpes zoster infection or share its patterns.

Evidence

Acupuncture for shingles and postherpetic neuralgia has the stronger evidence base here. Randomised trials and meta-analyses suggest acupuncture reduces acute pain and the incidence of postherpetic neuralgia compared with standard or sham care, and a 2019 Cochrane review on acupuncture for neuropathic pain included postherpetic neuralgia with low to moderate quality evidence of benefit. Chinese herbal trials of Long Dan Xie Gan Tang report faster crusting and less pain, but rigorous English-language trials are lacking.

Studies often cited

PubMed records for the TCM evidence

Real PubMed records for the TCM clinical evidence discussed above, selected by condition name and title relevance. They are references, not proof of benefit.

• [Segmental Zoster Paresis:Report of One Case and Literature Review].. Zhongguo yi xue ke xue yuan xue bao. Acta Academiae Medicinae Sinicae, 2020. PMID: 33423735.
• Case Report of Herpes Zoster Infection of the Cervical Dermatome - A Rare Cause of Acute Shoulder Pain.. Journal of orthopaedic case reports, 2024. PMID: 39157474.

Classical record