What is Herpes Zoster?

Herpes Zoster, commonly known as shingles, is a painful skin rash caused by the reactivation of the varicella-zoster virus—the same virus that causes chickenpox. After a person recovers from chickenpox, the virus lies dormant in the nervous system and can reactivate years later as shingles.

What Causes Herpes Zoster?

Shingles is caused by the varicella-zoster virus reactivating in nerve tissue. The exact trigger for reactivation is not always known, but it is more likely to occur in:

• Older adults (especially over 50)
• People with weakened immune systems (due to illness, medications, or stress)
• Individuals with a history of chickenpox

What Are the Symptoms?

Shingles typically affects one side of the body and follows the path of a nerve. Symptoms include:

• Pain, burning, or tingling sensation (often the first sign)
• Red rash that appears a few days later
• Fluid-filled blisters that break open and scab over
• Itching or sensitivity to touch
• Fever, headache, or fatigue

The pain can range from mild to severe and may continue even after the rash heals—a condition called postherpetic neuralgia (PHN).

How Is It Diagnosed?

Doctors can often diagnose shingles based on:

• Physical examination of the rash and symptoms
• Medical history (especially past chickenpox infection)
• In some cases, lab tests (such as PCR or viral culture) may be used to confirm the diagnosis

What Is the Treatment?

Early treatment can shorten the duration and reduce the severity of symptoms. Common treatments include:

• Antiviral medications (e.g., acyclovir, valacyclovir, famciclovir) – most effective if started within 72 hours of the rash
• Pain relief medications (e.g., ibuprofen, acetaminophen, or prescription pain relievers)
• Topical creams or lidocaine patches for localized pain
• Cool compresses or oatmeal baths for skin relief

Are There Any Complications?

Complications from shingles can include:

• Postherpetic neuralgia (PHN) – lingering nerve pain that can last for months or years
• Vision loss – if shingles affects the eye (ophthalmic shingles)
• Skin infections – if blisters become infected
• Neurological problems – such as hearing loss or facial paralysis (in rare cases)

What Is the Outlook?

Most people recover from shingles within 2 to 4 weeks. However, some may experience long-term pain or other complications. Early treatment helps improve outcomes and reduce the risk of PHN.