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Postherpetic neuralgia (PHN) is nerve pain that lingers in the same area after a shingles rash has healed — usually defined as pain still present about three months after shingles began. It's the most common complication of shingles, far more likely with age. Starting antivirals early and getting the shingles vaccine are the two best ways to lower the risk.
For most people, shingles runs its course and the pain fades as the rash heals. But for some — more often older adults — the pain refuses to leave. The rash crusts over and disappears, yet the same patch of skin keeps burning, aching, or stinging for weeks or months. That lingering pain has a name: postherpetic neuralgia, the most common complication shingles leaves behind.
Understanding why it happens, who it tends to affect, and what can be done about it takes some of the worry out of it. Below is a plain-language walk through what PHN actually is, how it's treated, and — most usefully — the two steps that meaningfully lower your odds of ever dealing with it.
What postherpetic neuralgia is
Postherpetic neuralgia is nerve pain that persists in the area where you had shingles, after the rash itself has healed. Clinicians commonly define it as pain that is still present about three months (roughly 90 days) after the shingles episode began. In other words, the blisters have come and gone, the skin looks healed — and yet the pain stays.
The reason comes down to what shingles does on its way out. Shingles is a reactivation of the same virus that caused chickenpox, and as it travels back along a nerve to the skin, it inflames and damages that nerve. Even after the skin heals, the injured nerve can keep firing pain signals as if the threat were still there. That's why PHN is felt as nerve pain rather than skin pain, and why it can be so persistent.
The pain itself takes a few recognizable forms. People describe it as a deep burning or aching, sharp stabbing jolts, or both. A hallmark feature is that the skin in the affected area can become exquisitely sensitive, so that even something as gentle as a light touch, a breeze, or the brush of clothing triggers pain — a phenomenon doctors call allodynia. The pain follows the same one-sided band where the rash appeared, because it's tied to the specific nerve the virus damaged.
The rash is the part everyone notices, but the real story is in the nerve underneath. When the pain hangs around after the skin looks fine, that's the nerve still healing, and nerves take their time.
— John Venzor, DO
It's worth being clear about how common this is. PHN is the most frequent complication of shingles, but it is not inevitable, and the odds vary enormously from person to person — which brings us to who is most affected.
Who's most likely to get it
By far the biggest factor is age. PHN is uncommon in younger adults and becomes steadily more likely with each decade of life. A person in their 40s who gets shingles is unlikely to develop lasting nerve pain, while the risk climbs sharply for those in their 60s, 70s, and beyond. The factors that most raise the odds are:
- Older age — the dominant risk factor. PHN is uncommon under 50 and far more common in people in their 60s, 70s, and older.
- Severe pain during the acute shingles episode — the more intense the pain while the rash is active, the higher the chance it lingers.
- A severe or widespread rash — more extensive skin involvement tends to mean more nerve involvement.
- Shingles affecting the eye or face — these locations carry a higher risk of lasting nerve pain, and warrant prompt in-person care for other reasons too.
If several of these apply to you — say, an older adult with intense pain and a severe rash — it's reasonable to be more vigilant about treating shingles early and to mention the higher risk to your clinician. None of these factors guarantee PHN, but together they shift the odds.
How nerve pain is treated
There's no single cure for postherpetic neuralgia, but there are several effective ways to control the pain while the nerve slowly recovers. Treatment is tailored to how severe the pain is and how it responds, and a clinician will often adjust the approach over time. The main options fall into a few groups:
- Nerve-pain medicines such as gabapentin or pregabalin, which calm overactive nerve signaling and are among the most commonly used treatments for PHN.
- Certain antidepressants used for nerve pain — particularly the tricyclic class, which can ease neuropathic pain at doses a clinician selects.
- Topical treatments applied directly to the skin, such as lidocaine patches or capsaicin, which can help target a specific painful area.
- Over-the-counter pain relievers, which may be enough for milder cases.
The encouraging news is that postherpetic neuralgia usually improves over weeks to months as the nerve heals — but it can be stubborn, and some people need a combination of treatments before they find relief. This is very much a case where a clinician's guidance matters, both to choose the right starting treatment and to adjust it if the first approach falls short. Our guide on how shingles is treated covers the antiviral stage that comes first, before any nerve pain sets in.
If nerve pain after shingles is severe, not improving, or interfering with sleep, work, or daily life, don't try to wait it out alone — see a clinician. Effective treatments exist, and the right combination often takes some adjustment to find. Pain this persistent deserves a tailored plan rather than over-the-counter guesswork.
Lowering your risk
Here's the genuinely good news: postherpetic neuralgia is one of the more preventable complications of shingles, and the two most effective levers are both within reach.
The first is starting antiviral treatment early. When antivirals are begun within about 72 hours of the rash appearing, they not only shorten the shingles episode but also reduce the risk and duration of lingering nerve pain. That's why acting fast at the first sign of shingles matters so much — the window when treatment helps most is narrow. Our shingles treatment guide explains exactly why those first three days carry so much weight.
The second, and most powerful over the long run, is the shingles vaccine. Because it prevents shingles from happening in the first place — or makes a breakthrough case milder — it also prevents the postherpetic neuralgia that can follow. For adults at the age where shingles and PHN become more common, the vaccine is the single best protection available. Our guide on the shingles vaccine covers who should get it and when.
Taken together, these two steps address PHN from both ends: the vaccine lowers the chance of ever getting shingles, and early antivirals lower the chance that a case of shingles leaves lasting pain behind. Neither is a guarantee, but both meaningfully tilt the odds in your favor.