Postherpetic Neuralgia

Postherpetic neuralgia is persistent nerve pain that remains in the area of skin where a shingles rash occurred, continuing after the rash itself has cleared. Shingles is caused by the reactivation of the chickenpox virus, and the infection can damage the nerves in the affected area. When those nerves keep sending pain signals, the result is postherpetic neuralgia.

It is the most common lasting complication of shingles. The pain is felt in the same band of skin the rash followed, often on one side of the body — commonly the chest, but sometimes the face or elsewhere.

The risk rises with age, and postherpetic neuralgia is much more common in older adults. It is also more likely after a severe episode of shingles or one that involved a large area of skin or intense pain.

People with a weakened immune system or with conditions such as diabetes may be more susceptible. Getting prompt treatment for shingles, and being vaccinated where eligible, can help reduce the chance of developing it.

The main symptom is ongoing pain in the area where the shingles rash was. People often describe it as burning, aching, sharp, or stabbing, and it may be constant or come and go. The affected skin can become very sensitive, so that even a light touch — from clothing or a breeze — feels painful.

Some people also notice itching, numbness, or heightened sensitivity to temperature and pressure in the same area. The discomfort can affect sleep, mood, and everyday activities, especially when it lasts for a long time.

Postherpetic neuralgia is caused by nerve damage from the shingles infection. As the virus reactivates and travels along a nerve, it can injure the nerve fibers. Even after the rash heals, these damaged nerves may continue to send pain messages to the brain.

This is why the pain stays in the same area the rash followed. The more severe the nerve involvement during shingles, the greater the likelihood that pain will persist afterward.

Postherpetic neuralgia is usually diagnosed from your history and an examination. The key clue is nerve pain that continues in an area where you recently had shingles, after the rash has healed. A doctor will ask about the timing, the type of pain, and how it affects you.

Special tests are not usually needed, because the diagnosis is based on the pattern of shingles followed by lasting pain in the same area. Your doctor will check how the pain is affecting your daily life so that treatment can be matched to your needs.

Postherpetic neuralgia is treated with medicines aimed at nerve pain, which often work better than ordinary painkillers. These can include certain antidepressant medicines used at low doses for pain (such as amitriptyline or duloxetine) and anti-seizure medicines used for nerve pain (such as gabapentin or pregabalin). Simple pain relief may help milder pain.

Topical treatments applied to the skin can also help, including capsaicin cream and lidocaine patches for a localized painful area. Because people respond differently, your doctor may adjust the treatment over time to find the combination that gives you the most relief.

Alongside medicines, small steps can ease discomfort — such as wearing soft, loose clothing over sensitive skin and covering the area gently if light touch is painful. Keeping active within comfort and looking after your general wellbeing can help you cope.

Because long-lasting pain can affect sleep and mood, it is worth telling your doctor if it is wearing you down. For pain that is severe or hard to control, a referral to a specialist pain service can offer additional support and approaches.

The most effective way to lower the risk of postherpetic neuralgia is to reduce the chance of getting shingles in the first place. The shingles vaccine is offered to eligible older adults and to some people with weakened immune systems, and it lowers both the risk of shingles and the risk of this lasting pain.

If shingles does occur, seeing a doctor early — ideally within the first few days of the rash — and starting treatment promptly may reduce the severity of the illness and the likelihood of ongoing nerve pain.

For many people, postherpetic neuralgia gradually improves over time, though this can take from a few months to more than a year. The pain usually lessens slowly rather than stopping suddenly, and treatment can make it more manageable in the meantime.

In some people, particularly older adults, the pain can be more stubborn. Working with your doctor to adjust treatment, and seeking specialist help if needed, gives the best chance of keeping the pain under control while it settles.