If a shingles rash has healed but the pain hasn't, you're living with postherpetic neuralgia (PHN) — a burning, stabbing, or electric-shock-like pain that can persist for months or even years after the visible rash is gone. Because there's nothing to see, PHN can be confusing and isolating, sometimes misunderstood by people around you. A landmark Canadian study that followed patients for six months after their shingles diagnosis found that among those still dealing with PHN, the single most common complaint wasn't the pain itself — it was anxiety or depression. Your mental health is a central, measurable part of this condition, not an afterthought.
A Common and Underestimated Complication
Herpes zoster (shingles) is caused by reactivation of the varicella-zoster virus — the same virus responsible for chickenpox — which lies dormant in nerve tissue for decades and can reactivate as immune function naturally declines with age. It causes a painful blistering rash along the path of a single nerve. Postherpetic neuralgia is the most common complication: pain that continues after the rash has fully healed. A prospective study of 261 adults aged 50 and older, recruited within two weeks of their rash appearing, found that 83.5% reported moderate-to-severe pain at the outset, and 24.1% still had clinically significant pain 90 days later — the formal threshold the study used to define PHN. By 180 days, 13.0% were still affected.
The Anxiety and Depression That Often Follow
- Know that your mental health symptoms are well-documented, not unusual. The study's own conclusion stated it plainly: participants with postherpetic neuralgia most frequently reported problems with anxiety or depression, enjoyment of life, mood, and sleep — ahead of nearly every other complaint among those still affected.
- Understand the scale of the overall impact on daily life. At the start of the study, overall quality-of-life scores (measured on a standard 0-to-1 scale) averaged 0.59, compared with 0.78 for an age- and sex-matched general population — a gap far larger than what researchers consider a meaningful difference.
- Recognize that sleep and enjoyment of life take an especially hard hit. More than half of participants rated the pain's interference with sleep (63.9%), enjoyment of life (58.2%), and general activities (52.6%) as significant, early in their illness.
- Know that mood problems were common even while the rash was active, not just afterward. At recruitment, roughly 45% of participants reported some difficulty with anxiety or depression on a standard quality-of-life questionnaire — a reminder that the emotional toll can start immediately, not only once pain becomes chronic.
- Take comfort that this pattern eases for most people as pain eases. By the time participants' pain had resolved, the share reporting anxiety or depression problems dropped to roughly 15% — showing that for most people, the emotional burden tracks closely with the physical one and improves as it does.
Who Is Most at Risk, and for How Long
Risk of developing PHN rises sharply with age. Among participants in their 50s, 16.8% still had significant pain at 90 days, falling to 5.9% by 180 days. Among those in their 60s, it was 24.4% and 14.1%. Among those over 70, it was 32.9% and 20.7% — meaning older adults are both more likely to develop lingering pain and slower to recover from it. Quality of life was closely tied to pain severity throughout the study (a strong statistical correlation), and it stayed poor for as long as significant pain persisted, regardless of how much time had passed since the rash first appeared. This matters for anyone managing chronic pain more broadly: duration of illness, not just its original cause, shapes how much it affects daily life.
An Honest Picture, Including the Study's Limits
This study has real strengths: it followed patients prospectively from early in their illness, used a validated quality-of-life instrument, and compared results against population norms rather than relying on patients' memory alone. It also has honest limits the researchers themselves noted: not every eligible patient was offered participation, and the proportion who declined wasn't tracked, which leaves some room for selection bias; and because people were asked the same questions repeatedly over months, some of the change over time may reflect participants adjusting their own internal rating scale rather than pure symptom change. The 24.1% PHN rate here is higher than the 12% reported in one large vaccine trial, but strikingly similar to a 27% rate found in a separate UK study of care-seeking patients — suggesting the finding isn't a fluke of this one study. Like trigeminal neuralgia, PHN is a nerve-pain condition that's sometimes under-recognized by others simply because there's no visible sign of it once the rash is gone.
Ways to Cope
- Treat mood symptoms as a core part of your care, not a side issue. Given how consistently anxiety and depression show up alongside PHN, bringing these symptoms up with your care team is just as important as reporting pain levels.
- Seek care early if shingles pain is still moderate-to-severe past the first couple of weeks. Earlier, more aggressive pain management may help reduce the odds of pain becoming long-lasting, and your care team can discuss options suited to your situation.
- Expect that sleep may be one of the hardest-hit areas, and ask for help with it specifically. Since the majority of people in this study flagged sleep interference as a major issue, it's worth raising as its own topic rather than assuming it will resolve on its own.
- If others don't understand why you're still in pain after the rash is gone, know you're not alone in that experience. This is a recognized pattern with invisible, lingering nerve pain conditions, similar to challenges described on our medical gaslighting page.
- Hold onto the fact that most people do recover, even if it takes time. The share of people with significant pain fell from 24.1% at 90 days to 13.0% at 180 days in this study, and quality of life improved in step with pain — a pattern consistent with broader chronic illness recovery journeys.