Shingles isn’t just a rash. It’s the reactivation of the varicella-zoster virus, the same virus that causes chickenpox, lying dormant in nerve tissue for years or even decades before erupting into a painful, blistering outbreak. The symptoms of shingles affect roughly 1 million Americans each year, according to the Centers for Disease Control and Prevention, with the risk climbing sharply after age 50. About 1 in 3 people who had chickenpox will develop shingles at some point in their lifetime. Recognizing the symptoms early allows for faster treatment, which can reduce the severity and duration of the outbreak. For more health condition information, see our medical conditions guide.
What Causes Shingles
After you recover from chickenpox, the varicella-zoster virus doesn’t leave your body. It retreats into the dorsal root ganglia, clusters of nerve cells near the spinal cord, where it remains inactive (latent) indefinitely. In most people, the immune system keeps the virus suppressed permanently. But when immunity weakens, whether due to aging, stress, illness, or immunosuppressive medications, the virus can reactivate and travel along nerve fibers to the skin, causing shingles (herpes zoster).
You cannot “catch” shingles from someone else. However, a person with an active shingles rash can transmit the varicella-zoster virus to someone who has never had chickenpox or the chickenpox vaccine, causing them to develop chickenpox (not shingles). The virus spreads through direct contact with fluid from the blisters, not through coughing or sneezing. Once the blisters crust over, the person is no longer contagious.
Risk factors for shingles include age over 50, medical conditions that weaken the immune system (HIV/AIDS, cancer, autoimmune diseases), medications that suppress immune function (corticosteroids, chemotherapy, anti-rejection drugs after organ transplant), and significant physical or emotional stress. According to the NIH, shingles occurs at a rate of approximately 4 per 1,000 people annually in the general population, rising to 10 per 1,000 in adults over 75.
Early Symptoms: Before the Rash Appears
The earliest symptoms of shingles often begin 1 to 5 days before any visible rash, which makes the initial phase confusing and easy to misattribute to other causes. This pre-rash phase is called the prodromal stage.
Pain is usually the first symptom, ranging from a tingling or burning sensation to deep, aching, or stabbing pain in a localized area on one side of the body. The pain follows a dermatomal pattern, meaning it tracks along the path of a single nerve. Common locations include a band around one side of the torso, one side of the face, and one side of the neck or forehead.
Other prodromal symptoms may include headache, sensitivity to light, fatigue, a general feeling of being unwell (malaise), and occasionally a low-grade fever. Some people experience itching, numbness, or a hypersensitivity to touch in the affected area. Because these symptoms precede the rash, shingles is sometimes initially misdiagnosed as a pulled muscle, heart problem (when on the left chest), kidney stone (when on the flank), or even appendicitis.
The Shingles Rash: What It Looks Like
The characteristic rash typically appears 1 to 5 days after the onset of pain. It begins as clusters of small red bumps that quickly develop into fluid-filled blisters (vesicles). The rash follows a specific pattern that distinguishes shingles from other skin conditions.
Key visual features include: a band or stripe of blisters wrapping around one side of the torso (the most common presentation), blisters that follow a dermatomal distribution (staying within a single nerve’s territory), redness and inflammation of the surrounding skin, and a clear demarcation at the body’s midline, with the rash almost never crossing to the other side.
The blisters typically fill with clear fluid, then become cloudy or yellowish over 3 to 5 days, before rupturing, oozing, and crusting over. New blisters may continue to appear for up to a week. Complete healing takes 2 to 4 weeks in most cases, though the skin may remain discolored or scarred.
Shingles on the face deserves special attention. When the virus affects the ophthalmic branch of the trigeminal nerve, it can involve the eye (herpes zoster ophthalmicus), causing eye pain, redness, swelling, and potentially vision-threatening complications including corneal damage. If blisters appear on the tip of the nose (Hutchinson’s sign), eye involvement is likely and requires immediate ophthalmologic evaluation.
Pain During and After Shingles
Pain is the defining symptom of shingles and ranges from mild to excruciating. During the active outbreak, the affected skin area is typically painful, burning, and extremely sensitive to touch. Even the light pressure of clothing against the skin (allodynia) can be unbearable for some patients.
The most feared complication is postherpetic neuralgia (PHN), persistent nerve pain that continues for months or even years after the rash has healed. PHN occurs in approximately 10% to 18% of shingles patients overall, but the risk increases dramatically with age: up to 30% to 40% of patients over 60 develop PHN, according to the Mayo Clinic.
PHN pain is described as burning, stabbing, or electric shock-like and can be severe enough to interfere with sleep, daily activities, and quality of life. Treatment includes gabapentin, pregabalin, topical lidocaine patches, capsaicin cream, and sometimes opioid medications for severe cases. Starting antiviral treatment within 72 hours of rash onset significantly reduces the risk of developing PHN.
When to See a Doctor
Seek medical attention promptly if you develop a painful, blistering rash on one side of your body, especially if you’re over 50 or have a weakened immune system. Early treatment is critical.
Antiviral medications (acyclovir, valacyclovir, or famciclovir) are most effective when started within 72 hours of rash onset. They can shorten the duration of the outbreak, reduce the severity of acute pain, and lower the risk of postherpetic neuralgia. After 72 hours, antivirals are still prescribed but may be less effective.
When to seek emergency care: Call 911 or go to the nearest emergency room if you experience shingles pain or rash near the eye (risk of vision loss), a rash that is widespread rather than confined to one area (may indicate a severely weakened immune system), high fever above 103 degrees F, confusion or severe headache with neck stiffness (possible viral meningitis), or facial weakness or drooping.
The Shingles Vaccine: CDC Recommendations
The CDC recommends that adults aged 50 and older receive the Shingrix vaccine (recombinant zoster vaccine), regardless of whether they remember having chickenpox. Two doses are given 2 to 6 months apart. Shingrix is also recommended for adults 19 and older who are or will be immunodeficient or immunosuppressed due to disease or therapy.
Shingrix is over 90% effective at preventing shingles and postherpetic neuralgia in adults 50 and older, and remains over 85% effective for at least four years after vaccination, according to the CDC. The earlier Zostavax vaccine (live attenuated) has been discontinued in the United States and is no longer recommended. Adults who previously received Zostavax should still get Shingrix.
Common vaccine side effects include soreness at the injection site, muscle pain, fatigue, headache, fever, and gastrointestinal symptoms. These side effects typically last 2 to 3 days and are significantly milder than an actual shingles episode. Most insurance plans, Medicare Part D, and many pharmacies cover Shingrix with minimal out-of-pocket cost.
Even if you’ve already had shingles, the CDC recommends Shingrix to help prevent future episodes. Shingles can recur, and the vaccine reduces the risk of recurrence and the severity of any future outbreaks.
Complications Beyond Nerve Pain
While postherpetic neuralgia is the most common complication, shingles can cause several other serious problems. Vision loss can result from herpes zoster ophthalmicus if it damages the cornea or other eye structures. Ramsay Hunt syndrome occurs when shingles affects facial nerves near the ear, causing facial paralysis, hearing loss, and vertigo. Bacterial skin infections can develop if blisters become contaminated. In rare cases, particularly in immunocompromised patients, shingles can spread to the brain (encephalitis) or other organs.
A study in the Journal of the American College of Cardiology found that shingles is associated with a modestly increased risk of stroke and heart attack in the weeks to months following an outbreak, likely due to the inflammatory response triggered by viral reactivation. This risk appears highest in patients who develop herpes zoster ophthalmicus.
Frequently Asked Questions
How long does shingles last?
An active shingles outbreak typically lasts 2 to 4 weeks from the first appearance of blisters to complete crusting and healing. The pain may begin 1 to 5 days before the rash and can persist after healing as postherpetic neuralgia in some patients. Antiviral treatment started early can shorten the active phase by several days.
Is shingles contagious?
You cannot give someone shingles directly. However, a person with active shingles blisters can transmit the varicella-zoster virus to someone who has never had chickenpox or the chickenpox vaccine, causing them to develop chickenpox. The virus spreads through direct contact with blister fluid. Once blisters have crusted over, the person is no longer contagious.
Can you get shingles more than once?
Yes. Although most people only get shingles once, recurrence is possible, especially in people with weakened immune systems. Studies suggest a recurrence rate of roughly 5% to 6% over an 8-year period. The Shingrix vaccine is recommended even after a shingles episode to reduce the risk of recurrence.
What does shingles pain feel like?
Shingles pain is described as burning, stabbing, shooting, or electric shock-like. It affects a specific area on one side of the body and can be triggered or worsened by light touch, wind, or clothing contact. Some patients rate the pain as among the worst they’ve ever experienced. The severity varies widely between individuals.
At what age should you get the shingles vaccine?
The CDC recommends the Shingrix vaccine for all adults 50 and older, given as two doses 2 to 6 months apart. Adults 19 and older who have weakened immune systems should also receive Shingrix. The vaccine is over 90% effective at preventing shingles and is recommended regardless of whether you remember having chickenpox.
What to Do Next
If you’re experiencing a painful rash on one side of your body, see a doctor as soon as possible. Antiviral treatment is most effective within 72 hours of rash onset, so time matters. If you’re 50 or older and haven’t been vaccinated with Shingrix, talk to your pharmacist or healthcare provider about getting the two-dose series. Prevention through vaccination is far easier and less painful than treating an active symptoms of shingles outbreak, and it dramatically reduces the risk of the debilitating nerve pain that can follow.