Postherpetic Neuralgia: Nerve Pain After Shingles
Why pain outlasts the rash, who it happens to, why ordinary painkillers do not touch it, and the medicines that actually work — given enough time to.
Part of the Complete Shingles Guide.
Key fact: This is nerve pain, not inflammatory pain, which is why paracetamol and ibuprofen barely touch it. The medicines that work — amitriptyline, duloxetine, gabapentin or pregabalin — need weeks and gradual dose increases, so a fair trial means reaching an adequate dose before judging them.
What postherpetic neuralgia is
Postherpetic neuralgia is nerve pain that persists after the shingles rash has healed. The virus damages the affected nerve during the acute episode, and in some people that nerve continues to send pain signals long after the skin has recovered. It is usually defined as pain continuing three months or more from the onset of the shingles episode.
It is the most common complication of shingles and the one that most affects quality of life. The pain is genuinely different in character from the acute rash pain:
- Burning, aching or stabbing pain in the area where the rash was
- Allodynia — pain from things that should not hurt, such as clothing, bedsheets, a breeze or a shower
- Itching or crawling sensations, or numbness alongside the pain
- Pain that fluctuates, often worse at night, in cold weather or with tiredness
- Sleep disturbance, low mood and fatigue as consequences rather than causes
Who is most likely to get it
Age
The strongest factor by far. It is uncommon under 50 and becomes progressively more likely with each decade after that.
Severe pain during the episode
Intense pain in the acute phase, and pain before the rash appeared, both predict a higher chance of persistence.
Extensive rash
A widespread or severe rash is associated with more nerve damage.
Face or eye involvement
Ophthalmic shingles carries a higher risk of prolonged pain — see shingles on the face and eye.
Prevention starts during the acute episode. Antiviral treatment started within three days of the rash appearing reduces the risk of prolonged nerve pain, and treating acute pain properly matters too. Underplaying how bad the pain is during the rash phase is a false economy — see antivirals for shingles.
How it is treated
The key thing to understand is that ordinary painkillers largely do not work for nerve pain. Paracetamol and ibuprofen may take the edge off, but the medicines that treat postherpetic neuralgia are the ones used for neuropathic pain generally, and they act on nerve signalling rather than inflammation.
| Option | What it is | Notes |
|---|---|---|
| Amitriptyline | A tricyclic, used at low doses for nerve pain | Taken at night; can help sleep; dry mouth and drowsiness are common early on |
| Duloxetine | An SNRI used for neuropathic pain | An alternative first-line option |
| Gabapentin | An anticonvulsant used for nerve pain | Built up gradually; drowsiness and dizziness are the usual limiting effects |
| Pregabalin | Similar class to gabapentin | Also titrated upwards; both are controlled drugs in the UK |
| Capsaicin cream | Topical, for localised pain | An option where oral medicines are unsuitable; causes initial burning |
| Lidocaine plasters | Topical local anaesthetic | Used in specialist settings for localised pain |
NICE treats amitriptyline, duloxetine, gabapentin and pregabalin as first-line options for neuropathic pain, any of which may be tried first — if one does not work or is not tolerated, switching to another is the standard next step rather than concluding that nothing helps. Tramadol is used only for short-term rescue, and ordinary opioids are not a long-term answer for this kind of pain.
These medicines need time and titration. Most are started at a low dose and increased gradually over weeks, and a fair trial means reaching an adequate dose before judging it. Stopping after three days because nothing happened is the most common reason people believe they have run out of options.
When medicines are not enough
If pain remains poorly controlled after trying two or more first-line medicines at adequate doses, referral to a specialist pain service is appropriate. Options there include nerve blocks, combinations of medicines, higher-strength topical treatments, and structured pain management programmes that address sleep, activity and mood alongside the pain itself.
That last part is not a consolation prize. Persistent pain disrupts sleep, and poor sleep lowers pain thresholds, so tackling both together tends to work better than either alone.
How long it lasts
Most postherpetic neuralgia improves over time. Many people find it settles substantially within a year, and a smaller group has pain that persists longer. Improvement is usually gradual rather than sudden, which makes it hard to notice week to week — keeping a simple weekly pain score is more informative than memory.
Seek prompt medical advice if pain is severe and uncontrolled, if you develop new weakness, if there is any change in vision where the rash involved the face, or if you feel unable to cope. Persistent pain with low mood or thoughts of self-harm needs urgent support — contact your GP or NHS 111 the same day.
Reducing the chance of it happening again
Vaccination is the main preventive measure, because preventing shingles prevents the complication. The NHS programme is age-based and having had shingles does not make you ineligible — see the shingles vaccine in the UK. If you do get another episode, treatment within three days of the rash appearing is the most important thing you can influence.
Frequently Asked Questions
What is postherpetic neuralgia?
Nerve pain that persists after the shingles rash has healed, usually defined as pain continuing three months or more from the onset of the episode. It happens because the virus damaged the nerve during the acute illness, and it can involve burning or stabbing pain, numbness, and pain from light touch such as clothing or bedsheets.
How long does nerve pain after shingles last?
It varies, but most cases improve over time and many settle substantially within a year. A smaller group has pain that lasts longer. Improvement is usually gradual, so a simple weekly pain score is more useful than trying to judge progress from memory.
Why don't normal painkillers work?
Because this is nerve pain rather than inflammatory pain. Paracetamol and ibuprofen may take the edge off but rarely control it. The medicines that work act on nerve signalling — amitriptyline, duloxetine, gabapentin or pregabalin — and NICE treats any of these four as a reasonable first choice for neuropathic pain.
How long do the nerve pain medicines take to work?
Weeks rather than days. They are usually started at a low dose and increased gradually, and a fair trial means reaching an adequate dose before judging the result. Stopping after a few days because nothing happened is the commonest reason people conclude that no treatment helps.
Can postherpetic neuralgia be prevented?
The risk is reduced by starting antiviral treatment within three days of the rash appearing, and by treating acute pain properly rather than underplaying it. Beyond that, the shingles vaccine prevents episodes in the first place, and having had shingles does not make you ineligible for it.
Who is most likely to get it?
Age is the strongest factor — it is uncommon under 50 and becomes more likely with each decade after. Severe pain during the acute episode, pain before the rash appeared, an extensive rash, and involvement of the face or eye all increase the risk.
References
- NHS. Shingles. nhs.uk
- NHS. Shingles vaccine. nhs.uk
- National Institute for Health and Care Excellence. Clinical Knowledge Summary: Shingles. cks.nice.org.uk
- National Institute for Health and Care Excellence. Neuropathic pain in adults: pharmacological management (CG173). nice.org.uk
- UK Health Security Agency. Shingles: guidance and vaccination programme. gov.uk
Medical disclaimer: This article is for informational purposes only and does not constitute medical advice. Shingles treatment is time-sensitive and needs assessment by a clinician. Always consult a qualified healthcare professional for diagnosis and treatment. In a medical emergency, call 999.