The Virus That Never Left: What Every Adult Should Know About Shingles
If you had chickenpox as a child—and most adults over 40 did—there's something you should know: the virus never left your body. It's been dormant in your nerve cells for decades, and it can reactivate at any time, causing a painful condition called shingles.
Approximately 1 in 3 Americans will develop shingles during their lifetime. The risk increases significantly after age 50, and the older you are when shingles strikes, the more likely you are to experience severe complications. Understanding this condition—and knowing how to prevent it—is essential for every adult.
How Shingles Develops
Shingles (herpes zoster) is caused by the varicella-zoster virus (VZV)—the same virus that causes chickenpox. After you recover from chickenpox, the virus doesn't leave your body. Instead, it retreats to nerve cells near your spine and brain, where it remains inactive, held in check by your immune system.
Years or decades later, the virus can reactivate. When it does, it travels along nerve fibers to the skin, causing the characteristic painful, blistering rash of shingles.
Scientists aren't entirely sure what triggers reactivation, but weakened immunity plays a key role. This explains why shingles becomes more common as we age and our immune systems naturally decline.
Recognizing the Symptoms
Shingles typically develops in stages:
Early Warning Signs (1-5 Days Before Rash)
- Pain, burning, or tingling in a specific area—often described as intense sensitivity
- Numbness or itching
- Flu-like symptoms without fever: fatigue, headache, general malaise
- Sensitivity to touch in the affected area
Many people don't recognize these early symptoms as shingles, which can delay treatment.
The Rash Appears
- Red patches develop, usually on one side of the body
- Fluid-filled blisters form within 1-2 days
- Rash typically appears in a band or strip following a nerve path
- Most common locations: torso (wrapping from spine to chest), face, neck
- Rash is usually limited to one side of the body
Healing Phase (2-4 Weeks)
- Blisters break open and crust over
- Scabs form and gradually heal
- Pain may persist even after rash clears
The Pain of Shingles
Shingles pain can be excruciating. People describe it as:
- Burning or searing
- Stabbing or shooting
- Deep, aching
- Electric shock-like
- Constant or intermittent
The affected skin may be so sensitive that even clothing touching it causes intense discomfort. This severe pain distinguishes shingles from many other rashes.
Complications: Why Shingles Is Serious
While shingles itself is miserable, the potential complications make it truly concerning:
Postherpetic Neuralgia (PHN)
The most common and feared complication. PHN is nerve pain that persists long after the rash heals—sometimes for months or years. It occurs when the virus damages nerve fibers, causing them to send exaggerated pain signals to the brain.
- Affects 10-18% of shingles patients
- Risk increases dramatically with age:
- Under 40: rare
- 60-69: about 20%
- Over 70: up to 30%
- Pain can be debilitating and difficult to treat
- May interfere with sleep, mood, and daily activities
Eye Complications
Shingles involving the eye (herpes zoster ophthalmicus) can cause:
- Severe eye pain
- Vision problems
- Corneal damage
- In severe cases, permanent vision loss
Shingles on the face, especially near the eye or nose tip, requires urgent medical attention.
Other Complications
- Bacterial skin infections from scratching blisters
- Hearing loss or facial paralysis (Ramsay Hunt syndrome) when nerves near the ear are affected
- Encephalitis (brain inflammation)—rare but serious
- Disseminated shingles in immunocompromised individuals
Who Is at Risk?
Anyone who has had chickenpox can develop shingles. Risk factors include:
- Age over 50: Risk increases with each decade
- Weakened immune system: From HIV/AIDS, cancer treatments, organ transplants, or immunosuppressive medications
- Stress: Physical or emotional stress may trigger reactivation
- Certain medications: Long-term steroid use, chemotherapy
- Previous shingles: You can get shingles more than once
Is Shingles Contagious?
You cannot "catch" shingles from someone. However, the virus in shingles blisters can cause chickenpox in someone who has never had chickenpox or the chickenpox vaccine.
Until all blisters have crusted over, people with shingles should avoid:
- Pregnant women who haven't had chickenpox
- Premature or low-birth-weight infants
- People with weakened immune systems
- Anyone who hasn't had chickenpox or the vaccine
Treatment: Time Is Critical
If you suspect shingles, see a doctor within 72 hours of rash onset. Early treatment with antiviral medications can:
- Shorten the duration of the outbreak
- Reduce severity of symptoms
- Lower the risk of complications, including PHN
Antiviral medications (acyclovir, valacyclovir, famciclovir) work best when started early. After 72 hours, they're less effective but may still help.
Pain management may include:
- Over-the-counter pain relievers
- Prescription pain medications
- Topical treatments (lidocaine patches, capsaicin cream)
- Nerve blocks for severe cases
- Antidepressants or anticonvulsants for nerve pain
Prevention: The Shingles Vaccine
The most effective way to protect yourself from shingles is vaccination.
Shingrix: The Recommended Vaccine
Shingrix is a two-dose vaccine recommended for:
- Adults 50 and older
- Adults 19 and older with weakened immune systems
Key facts about Shingrix:
- Over 90% effective at preventing shingles
- Over 90% effective at preventing postherpetic neuralgia
- Protection remains strong for at least 7 years
- Two doses required, 2-6 months apart
- Recommended even if you've had shingles before
- Recommended even if you received the older vaccine (Zostavax)
Common Side Effects
Shingrix can cause temporary side effects:
- Sore arm
- Fatigue
- Muscle pain
- Headache
- Fever or chills
These typically resolve within 2-3 days and are signs your immune system is responding. The temporary discomfort is far preferable to shingles itself.
Who Should Not Get Shingrix?
- Those with a severe allergic reaction to any component
- Those currently experiencing shingles (wait until recovered)
- Pregnant or breastfeeding women (limited data)
Discuss with your doctor if you have concerns about vaccination.
The Bottom Line
Shingles is common, painful, and potentially devastating—but largely preventable. If you're over 50 and haven't been vaccinated, or if you're younger with risk factors, talk to your doctor about Shingrix.
If you develop symptoms that could be shingles—especially pain, tingling, or a rash on one side of your body—seek medical attention immediately. Early treatment makes a significant difference in outcomes.
Don't wait for shingles to remind you that the chickenpox virus never really left. Take action now to protect yourself.
Getting the Shingles Vaccine in Practice
The recommendation is simple; the logistics generate most of the questions I hear at visits.
Timing around other vaccines, travel, and illness
Shingrix can be given at the same visit as the flu, COVID, pneumococcal, and RSV vaccines, in a different arm, and there is no need to space them out. The second dose is due two to six months after the first; if it slips beyond six months, you get the second dose when you can rather than starting over. Plan the two doses around snowbird travel so the series is finished before you head north or south, and expect a day or two of arm soreness and fatigue that is worth scheduling away from a big event. A mild cold is not a reason to delay. Our adult vaccine checklist lists what else is due at the same age.
If you have had shingles or take medications that suppress immunity
You can and should be vaccinated after a case of shingles once the rash has healed. Adults 19 and older on medications such as methotrexate, prednisone, or biologics for autoimmune disease qualify for Shingrix now rather than at 50, because the vaccine contains no live virus and their risk of a severe case is higher. The National Institute on Aging covers vaccination for older adults in plain language.
Treating Shingles: What the First Week Looks Like
Once the rash is recognized, the next seven days follow a predictable course, and a few details make it go better.
The antiviral course
Valacyclovir, famciclovir, or acyclovir is taken for seven days, and valacyclovir's three-times-daily dosing is easier to keep up than acyclovir's five. All three are cleared by the kidneys, so we adjust the dose for chronic kidney disease, and drinking well through the week matters, especially in the Florida heat. Starting after 72 hours is not pointless: new blisters still forming, facial involvement, or a weakened immune system all justify treatment later than that.
Pain control and the skin
Acetaminophen or an anti-inflammatory handles most early pain. When it does not, gabapentin or pregabalin targets the nerve component and is the same medication used if postherpetic neuralgia develops. Keep the rash loosely covered with a dry dressing, avoid scratching, and watch for spreading redness or pus that signals a bacterial infection. Until the blisters crust, stay away from pregnant women who have not had chickenpox, infants, and anyone on chemotherapy. MedlinePlus has a good overview of the full course.
Shingles and Your Other Conditions
The virus does not respect the boundaries of the skin, and a few complications involve organs we manage every day.
The eye, the ear, and the face
A rash on the forehead or the tip of the nose means the nerve serving the eye is involved, and that needs a same-day ophthalmology exam regardless of how the eye feels. Blisters in the ear canal with facial weakness are Ramsay Hunt syndrome, which looks like the Bell's palsy we describe in our article on sudden facial drooping but recovers less completely and needs antivirals urgently.
Stroke risk and the weeks after
Shingles inflames blood vessels as well as nerves, and the risk of stroke and heart attack is elevated in the weeks after an episode, most clearly when the eye is involved. That is one more reason to control blood pressure and take prescribed antiplatelet or statin medications through the recovery, and to treat new weakness, speech change, or vision loss as an emergency rather than a shingles symptom.
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