Nerve Pain After Shingles (Postherpetic Neuralgia): Why Does It Persist and Will It Go Away?
By Dr Lim Tzyy Huei | Consultant Dermatologist, Pantai Hospital Batu Pahat, Johor, Malaysia
The shingles rash has healed, the blisters have disappeared, but the pain is still there.
Why? This is a common concern among patients recovering from shingles, also known as herpes zoster, kayap (Malay), or 生蛇 (Chinese).
Some patients experience persistent burning, stabbing, or electric shock-like pain even after their skin looks completely normal.
This condition is known as postherpetic neuralgia (PHN), a form of nerve pain that can last for months or occasionally years after shingles.
The good news is that many patients gradually improve, and treatments are available to help control the discomfort.
1. What Is Postherpetic Neuralgia?
Postherpetic neuralgia is persistent nerve pain following a shingles infection. Shingles occurs when the chickenpox virus, known as the varicella-zoster virus, becomes active again within the nerves.
During the infection, the virus causes inflammation and injury to the affected nerves. Even after the skin lesions have healed, these nerves may continue sending abnormal pain signals to the brain.
This explains why some patients still experience pain despite having no visible rash. Medically, postherpetic neuralgia is commonly defined as pain persisting for more than 90 days after the shingles rash began.
Pain occurring earlier during recovery may be described as acute or subacute zoster-associated neuralgia.
Postherpetic neuralgia is a complication of shingles, but not everyone who develops shingles will experience persistent nerve pain.
If you would like to understand more about why shingles occurs, its early symptoms, antiviral treatment, recovery time and prevention, you can read my related article: Shingles (Herpes Zoster): Why Does It Happen, How Is It Treated, and Will the Pain Go Away?
2. What Does Postherpetic Neuralgia Feel Like?
The pain can vary considerably between patients.
Common descriptions include:
Burning or hot sensations beneath the skin
Sharp, stabbing, or shooting pain
Electric shock-like sensations
Persistent aching or throbbing
Tingling or numbness
Extreme sensitivity to light touch
Pain when clothing or bedsheets touch the skin
Some patients experience constant discomfort, while others have intermittent episodes of severe pain.
The affected area usually corresponds to the location of the previous shingles rash.
For example, a patient who had shingles over one side of the chest may continue to experience burning or shooting pain in the same area.
3. Why Does the Skin Hurt Even After the Rash Has Healed?
This happens because shingles affects not only the skin but also the underlying sensory nerves.
During the infection, the virus can damage or irritate these nerves, making them unusually sensitive.
As a result, normal sensations such as gentle touch, clothing friction, or temperature changes may be interpreted as pain.
This abnormal sensitivity is called allodynia.
For some patients, even a soft shirt touching the affected area may feel extremely uncomfortable.
Importantly, persistent nerve pain does not necessarily mean that the shingles virus is still actively multiplying.
4. Who Is More Likely to Develop Postherpetic Neuralgia?
Not everyone who develops shingles will experience prolonged nerve pain.
The risk is higher in:
Adults aged 50 years and above, especially the elderly
Patients who experience severe pain during shingles
Individuals with extensive blistering eruptions
Patients with weakened immune systems
People with certain chronic medical conditions
The likelihood of persistent nerve pain generally increases with age.
However, younger adults can occasionally develop postherpetic neuralgia as well.
5. How Long Does Postherpetic Neuralgia Last?
This is one of the most frequently asked questions.
Unfortunately, there is no fixed recovery period.
Some patients experience gradual improvement within a few months, while others may continue having symptoms for a year or longer.
Recovery depends on several factors, including age, severity of nerve involvement, and individual response to treatment.
For many patients, the pain gradually becomes less intense and less frequent.
Persistent nerve pain does not automatically mean permanent nerve damage or lifelong pain.
Nevertheless, some individuals may experience prolonged symptoms requiring ongoing management.
6. What Treatments Are Available?
Unlike ordinary muscle or joint pain, postherpetic neuralgia involves abnormal nerve signalling.
Therefore, common painkillers such as paracetamol may not provide sufficient relief.
Treatment usually focuses on medications specifically designed to manage nerve-related pain.
A. Gabapentin and Pregabalin
Gabapentin and pregabalin are commonly prescribed medications for postherpetic neuralgia.
They help reduce abnormal nerve signalling and may improve:
Burning or shooting pain
Electric shock-like sensations
Skin hypersensitivity
Sleep disturbance caused by nerve pain
These medications are usually started at a low dose and adjusted gradually according to treatment response.
They may take several days or weeks to provide meaningful relief.
Possible side effects include dizziness, drowsiness, and unsteadiness.
Dose adjustment is particularly important in older patients and those with impaired kidney function.
B. Certain Antidepressant Medications
Some medications originally developed for depression, such as amitriptyline or nortriptyline, can also help relieve nerve pain.
They work by modifying how pain signals are processed within the nervous system.
These medications may be prescribed at lower doses than those typically used to treat depression.
They are not suitable for everyone, particularly certain older patients or individuals with specific heart conditions or other contraindications.
C. Topical Treatments
For patients with pain affecting a limited area, topical treatments may be useful.
Options include:
Lidocaine patches or preparations
Capsaicin-based treatments under appropriate medical supervision
These treatments act locally and may be considered when oral medications are poorly tolerated or insufficient.
They should only be used as directed, particularly when the skin is sensitive or fragile.
D. Specialist Pain Management
For patients with severe or persistent symptoms despite medication, referral to a pain specialist may be considered.
Depending on the individual situation, additional treatment options may include selected nerve blocks or other specialist pain-management procedures.
Not every patient requires these treatments.
7. What Can You Do at Home to Reduce the Pain?
Alongside prescribed treatment, simple adjustments may help reduce discomfort.
Wear loose, soft cotton clothing to minimise friction.
Avoid scratching or rubbing the painful area.
Use a cool compress if it provides relief.
Maintain regular sleep habits.
Keep a record of pain severity and treatment response.
Take prescribed medication consistently and avoid stopping it abruptly without medical advice.
Cold compresses may help some patients but worsen discomfort in others, particularly those with temperature sensitivity.
The aim is to identify measures that improve comfort without further irritating the nerves.
8. Can Antiviral Medication Treat Postherpetic Neuralgia?
Antiviral medications such as acyclovir and valacyclovir are important during an active shingles infection.
They work by reducing viral replication.
However, once the shingles rash has healed and established postherpetic neuralgia develops, antiviral medications generally do not relieve the persistent nerve pain.
At this stage, treatment focuses on controlling abnormal nerve signalling rather than treating an active viral infection.
This is why medications such as gabapentin or pregabalin may be prescribed instead.
9. Can Postherpetic Neuralgia Be Prevented?
The most effective preventive strategy is reducing the risk of shingles itself.
Shingles vaccination can significantly reduce the likelihood of developing shingles and its complications, including postherpetic neuralgia.
The recombinant shingles vaccine, Shingrix, is available in Malaysia for adults aged 50 years and above, as well as certain younger adults with increased risk.
For patients who develop shingles, antiviral treatment should ideally begin within 72 hours after the rash appears.
Early antiviral therapy can improve the course of acute shingles, although it does not reliably eliminate the risk of subsequent postherpetic neuralgia.
10. Frequently Asked Questions
Is postherpetic neuralgia contagious?
No. Postherpetic neuralgia is nerve pain following shingles, not an active contagious infection.
Does persistent pain mean the shingles virus is still active?
Not necessarily. The pain usually results from nerve injury or altered nerve signalling after the infection.
Can postherpetic neuralgia occur without visible skin changes?
Yes. The skin may appear completely healed while the underlying nerves remain sensitive.
Which is better for nerve pain: gabapentin or pregabalin?
Both medications can be effective. The choice depends on pain severity, other medical conditions, kidney function, potential side effects, and individual treatment response.
Neither medication is universally better for every patient.
Will I need nerve pain medication for the rest of my life?
Not necessarily. Many patients gradually improve, allowing medication to be reduced or discontinued under medical supervision.
When should I see a doctor?
Medical assessment is recommended if nerve pain persists, becomes more severe, affects sleep, or interferes with daily activities.
New weakness, visual symptoms, severe headache, or new blistering eruptions require prompt reassessment.
Final Thoughts
Postherpetic neuralgia can be frustrating because the skin may look completely normal while the pain continues.
For some patients, even simple activities such as wearing clothes, sleeping, or moving comfortably can become difficult.
Fortunately, many patients experience gradual improvement, and appropriate treatment can help reduce discomfort and improve quality of life.
You do not have to wait for the nerve pain to become unbearable before seeking treatment.
About the Author
Dr Lim Tzyy Huei (林子辉医生) is a Consultant Dermatologist at Pantai Hospital Batu Pahat, Johor, Malaysia.
His clinical practice includes the assessment and treatment of shingles, postherpetic neuralgia, and other skin-related conditions.
Medical Disclaimer: This article is intended for general patient education and does not replace individual medical consultation. Treatment suitability, medication choice, and recovery may vary depending on each patient's medical condition and individual needs. Please consult a qualified healthcare professional for appropriate assessment and treatment.
