Postherpetic Neuralgia

What is Postherpetic Neuralgia?

Postherpetic neuralgia is nerve pain that lasts for 3 months or more after an episode of shingles (herpes zoster). It is the most common long-term complication of shingles, which is caused by reactivation of the varicella-zoster virus, the same virus that causes chickenpox.^[1] It occurs in about one in five people who have shingles.^[2]

Common symptoms

The hallmark is lancinating (stabbing) or burning pain in one band of skin on one side of the body, in the area of the earlier rash.^[1] Many people also notice that light touch or clothing on the area hurts, and some have itching or numbness. Poor sleep and low mood often come with the pain.^[3]

Causes and risk factors

Postherpetic neuralgia can only follow shingles, and the two strongest risk factors for shingles are increasing age and a weakened immune system, so older adults and people with immunosuppression are most often affected.^[1] Damage to the nerve from the virus, inflammation, and sensitization of the spinal cord and brain all appear to play a part, although the exact mechanism is not fully understood.^[4]

How it is diagnosed and treated conventionally

Diagnosis is made by a physician from the history of shingles and the persistent pain in the same area.^{[1, 2]} Shingles itself is treated with antiviral medicines, ideally started within 72 hours of the rash. The shingles vaccine lowers the risk of shingles.^[2]

Once postherpetic neuralgia is established, treatment focuses on controlling symptoms. First-line options include topical lidocaine or capsaicin and oral gabapentin, pregabalin or tricyclic antidepressants.^{[2, 5]} Combination treatment often works better than one treatment alone, and nerve blocks or other interventional procedures are considered when pain is stubborn.^[5] Many cases are hard to treat, which is why care is usually multimodal.^[1]

Why Postherpetic Neuralgia calls for a whole-person approach

Postherpetic neuralgia involves more than the damaged nerve. Reviews describe nerve injury, inflammation and sensitization of the central nervous system working together, and treatment guidelines favor combining approaches.^{[4, 5]}

Pain that lasts for months also affects sleep, mood and daily function, which can in turn make pain harder to bear.

Nerve injury and inflammation

The virus injures sensory nerves and triggers inflammation around them, and this nerve damage is thought to start the pain.^[4]

Central sensitization

Long-lasting nerve pain can lead to central sensitization, in which the spinal cord and brain amplify pain signals, so that even light touch can hurt.^{[4, 6]}

Sleep and mood

Sleep and mood problems often come with long-lasting nerve pain, and acupuncture studies in postherpetic neuralgia measure sleep and depression scores alongside pain.^{[3, 7]}

Age and general health

Older age and a weakened immune system raise the risk of shingles and therefore of postherpetic neuralgia.^[1] Because this is a condition of older adults, other illnesses and medicines need to be taken into account when any complementary therapy is chosen.

Acupuncture for Postherpetic Neuralgia

What the research shows

Research suggests acupuncture may reduce postherpetic neuralgia pain, though the effect in the best trial was modest. A 2026 multicenter trial in 7 Chinese hospitals randomized 448 adults to 20 sessions of real or sham electroacupuncture over 4 weeks. Pain scores fell by an average of 1.52 points on a 0 to 10 scale with real electroacupuncture and 0.99 with sham, and 47% of the real group had at least a 30% pain reduction compared with 24% of the sham group. The benefit lasted through the 1-month follow-up.^[8]

Meta-analyses point the same way but rest on weaker studies. A review of 7 trials found acupuncture lowered pain scores more than medicine in the 2 trials that could be pooled, but all were done in China and of low quality, so the authors called the results inconclusive.^[9] A network meta-analysis of 29 trials (1,973 patients) found that acupuncture-related treatments eased pain more than antiepileptic drugs, and electroacupuncture combined with antiepileptic drugs ranked best for sleep and depression scores, though the authors urged caution.^[3] An overview of 7 systematic reviews concluded that acupuncture seems effective but rated the methodological quality of most reviews as low or critically low.^[10] A review of 13 trials of moxibustion, a warming therapy using burning herb near the skin, found better pain scores than controls but called the studies too weak for firm conclusions.^[11]

Results are not all positive. A small 1983 trial of 62 patients found no difference between acupuncture and placebo stimulation.^[12] A systematic review of 67 trials of neuropathic pain treatments, including postherpetic neuralgia, rated acupuncture evidence as very low quality and found no clear benefit, whereas anticonvulsants and SNRI antidepressants had moderate-certainty evidence of benefit.^[13]

How acupuncture may work

Researchers propose that acupuncture strengthens the body's own pain-dampening pathways and may ease central sensitization, along with lowering local inflammatory mediators.^[6] These are proposed mechanisms from general pain research, and they have not been confirmed in postherpetic neuralgia itself.

What treatment involves

Treatment uses fine, sterile, single-use needles placed at points on the body and sometimes around the painful area, often with mild electrical stimulation, usually left in for about 20 to 40 minutes. The large trial gave 20 sessions over 4 weeks.^[8] We reassess after a short course of visits.

Serious problems are rare. In prospective studies, about 9 in 100 patients had a minor reaction such as brief bleeding, soreness or redness at a needle site, and serious events occurred in about 1 in 10,000.^[14] Needling is not done through active shingles blisters. Tell the practitioner first if you have a bleeding disorder, take blood thinners, are pregnant, or have a pacemaker (relevant to electroacupuncture). Because the skin in the painful area may be very sensitive, we adjust the technique to what you can tolerate.

Ayurvedic medicine for Postherpetic Neuralgia

The Ayurvedic view

Ayurveda has no classical name that matches postherpetic neuralgia exactly. Shingles is traditionally linked to Pitta, the principle said to govern heat and inflammation, and the long-lasting burning, shooting pain after it is viewed as aggravated Vata, the principle said to govern movement and the nervous system. These are traditional categories, not biomedical diagnoses.

Therapies that may be used

Care is chosen for the individual and traditionally combines:

• Diet and daily routine intended to calm Vata and cool Pitta, such as regular meals, steady sleep hours and avoiding very spicy foods
• Gentle oil massage near, but not directly over, hypersensitive skin, if tolerated
• Breathing practices as a general support for stress and sleep
• Herbs prescribed individually by a qualified practitioner, as covered in the herbal section

Panchakarma procedures are not appropriate during pregnancy, acute illness or frailty, and strong procedures are not appropriate for older or medically fragile people.

What the research shows

There are no clinical trials of Ayurvedic medicine or Panchakarma for postherpetic neuralgia. A PubMed search for postherpetic neuralgia and shingles with Ayurveda, Panchakarma, turmeric, ashwagandha and Boswellia found only a few case reports of shingles treated with Ayurvedic methods. Case reports cannot show that a treatment works, so any benefit is unknown.

Because nerve pain of this kind is hard to treat and usually needs combined care, an Ayurvedic approach here is limited to general comfort and stress support alongside your medical treatment.^[5] About one fifth of Ayurvedic medicines bought online contained detectable lead, mercury or arsenic, so sourcing matters.^[15]

Herbal medicine for Postherpetic Neuralgia

Herbs and formulas that have been studied

Most research on herbs for this condition is Chinese medicine, with trials of herbal formulas taken by mouth, herbal preparations applied to the skin, and combined treatments. An evidence map found 976 randomized trials of Chinese medicine in postherpetic neuralgia, most with 51 to 100 patients, and the most common traditional pattern treated was qi stagnation with blood stasis.^[16] Acupoint herbal patching, in which herbal preparations are applied to the skin over acupuncture points, has been studied in 15 trials.^[7] Transdermal medication therapy at our clinic is a related approach, though we make no claim of benefit beyond this research. Liu Shen Wan, a commercial Chinese herbal preparation, has been studied for shingles and postherpetic neuralgia.^[17]

What the research shows

The evidence is limited and of low quality. The evidence map found that Chinese medicine shows potential benefit but that study design was often weak and outcomes inconsistent.^[16] A meta-analysis of 15 studies (1,362 participants) of acupoint herbal patching found better pain, sleep and depression scores than control, but only 2 studies reported adverse reactions, and the abstract does not rate study quality.^[7] A meta-analysis of 21 trials found that adding Liu Shen Wan to usual care shortened pain duration and lowered the rate of postherpetic neuralgia, and the authors said the study quality needs further investigation.^[17]

For herbs in neuropathic pain generally, a Cochrane review of double-blind trials found only two small studies (nutmeg spray and St John's wort), with insufficient evidence to say either helps.^[18]

Safety and herb-drug interactions

Herbs are active substances and can interact with medicines. A review of reported interactions describes serotonin syndrome when St John's wort was combined with SSRI antidepressants, and bleeding when warfarin was combined with danshen or ginkgo.^[19]

Many people with postherpetic neuralgia take gabapentin, pregabalin or antidepressants, so tell us about every medicine you use. Herbs should come from tested sources and be prescribed individually. Tell us if you are pregnant or breastfeeding, have liver or kidney disease, or take immunosuppressant medicines. Herbal preparations applied to the skin should not be used on broken skin or open shingles blisters.

Translating traditional medicine into modern biological language

The links drawn here are interpretation, not equivalence. Chinese medicine most often describes postherpetic neuralgia as qi stagnation and blood stasis, sometimes with residual heat or toxin, which loosely parallels what researchers measure: nerve injury, inflammation and amplified pain signaling in the spinal cord and brain.^{[4, 16]}

Ayurveda's aggravated Vata describes sharp, burning, shooting pain. No study has shown that a dosha or a Chinese pattern corresponds to a specific biological process.

How this care fits with your medical care

Integrative care for postherpetic neuralgia is complementary. For a condition like this, we ask that you are under a physician's care for it and that your treating team knows you are receiving complementary care. Do not stop or change prescribed medicines, patches or planned procedures without your prescriber.

We do not diagnose or treat shingles or the virus. Please bring your diagnosis, a full list of medicines and supplements, and details of any nerve blocks, injections or vaccination, so we can coordinate safely.

When to seek urgent medical care

Shingles needs prompt medical treatment, and some features signal a more serious problem.^[2]

• A new shingles rash, especially within the first 72 hours, when antiviral medicine works best
• A rash or pain near the eye, or any change in vision
• Fever, confusion, severe headache or stiff neck with shingles
• Facial weakness, hearing loss, or dizziness with a rash near the ear
• Pain that is suddenly much worse, or spreading redness, pus or warmth in the affected skin
• Weakness in an arm or leg that is new

If any of these occur, call 911 or go to the nearest emergency department.