Shingles (Herpes Zoster): Symptoms, Treatment, and When to Seek Care

What Is Shingles?

Shingles is the reactivation of varicella-zoster virus, the virus that causes chickenpox. It typically causes burning, tingling, or pain followed by grouped blisters on one side of a body region. Population studies estimate incidence around 3 to 5 cases per 1,000 person-years overall, rising to 8 to 12 per 1,000 person-years by age 80. ^[1]

Ranges are not individual risk estimates. Incidence increases sharply with age.^[1]

Symptoms and the Typical Course

Symptoms can start with pain, itching, numbness, or sensitivity in a strip of skin. A rash then appears in the same nerve distribution, forms blisters, and later crusts. Fever, headache, and fatigue can occur. A rash that crosses the midline widely, affects more than one dermatome, or comes with systemic illness is not a routine presentation. ^[1]

Why the 72-Hour Antiviral Window Matters

Antiviral studies most often started treatment within 72 hours after rash onset. Starting promptly can shorten active viral disease and acute pain. The 72-hour mark is not a hard stop: new lesions, eye involvement, immune suppression, or neurologic complications can still justify treatment after that time. ^[2][3][6][7]

The 72-hour mark is a clinical trial evidence window, not a reason to ignore high-risk cases that present later.^[2][3][8]

Antiviral Options and Dosing

For uncomplicated shingles in an immunocompetent adult, valacyclovir, acyclovir, and famciclovir are oral options. Doses must be individualized for kidney function, pregnancy, drug interactions, and illness severity. Valacyclovir has a simpler schedule than acyclovir. For a deeper look at each drug, dosing detail, and what to do when the 72-hour mark has passed, see the shingles antiviral window guide. ^[2][3][4]

Postherpetic Neuralgia: Pain That Persists

Postherpetic neuralgia, often shortened to PHN, is pain that continues after the rash has resolved. Older age and more severe acute shingles are associated with higher risk. Early clinical evaluation, pain control, and vaccination prevention are the most useful ways to address risk. ^[1][7][15]

These medicines require individualized review. The evidence base supports gabapentin, pregabalin, selected tricyclics, and topical lidocaine for PHN, with benefits and tolerability differing by person. ^{[12][13][14][16][17]}

Decision Framework: Telehealth, In-Person, or ER

A video visit can help when the rash is classic, limited to the trunk or limb, and visible in clear photographs, and the person is immunocompetent with no eye, ear, neurologic, or systemic symptoms. This assessment does not replace an examination when complications are possible. Antivirals and selected non-controlled neuropathic pain agents may be prescribed after a synchronous video evaluation across the United States when clinically appropriate and permitted by applicable rules.

Rash on the tip of the nose, known as Hutchinson sign, is associated with higher risk of ocular involvement. Oral antiviral treatment within 72 hours is particularly important in ophthalmic shingles, alongside same-day eye care when eye findings are present. ^{[8][9][10][11]}

Shingles of the Eye, Face, or Ear

Herpes zoster ophthalmicus can affect the forehead, upper eyelid, nose, and eye because the virus involves the first division of the trigeminal nerve. It accounts for a meaningful share of shingles cases and can lead to corneal or intraocular complications. ^[9][11]

Facial weakness with ear pain, ear blisters, hearing change, or vertigo can be Ramsay Hunt syndrome. This pattern needs prompt in-person assessment and often otolaryngology input. ^[15]

Shingles in Immunocompromised People

People with HIV, organ or stem-cell transplant, chemotherapy, hematologic cancer, or high-dose immunosuppressive treatment have a higher risk of complicated or disseminated disease. Do not rely on photos alone when lesions are widespread, crossing the midline, or accompanied by fever or illness. An in-person clinician can assess whether IV acyclovir or hospital-level care is needed. ^[21][22]

Comfort Measures During Active Shingles

Keep the rash clean and dry, wear loose clothing, and use cool compresses if they are soothing. Acetaminophen or an anti-inflammatory medicine may help some people if it is safe for them. Avoid picking blisters. A clinician should assess increasing redness, warmth, pus, or rapidly worsening pain because these can suggest bacterial infection. ^[15]

Shingrix Prevention and Long-Term Protection

ACIP recommends the two-dose recombinant zoster vaccine, Shingrix, for immunocompetent adults age 50 and older and for immunocompromised adults age 19 and older. In pivotal trials, efficacy was 97.2% in adults 50 and older, and pooled efficacy in adults 70 and older was 91.3%. ^{[18][19][20][21]}

Trial results are estimates from the ZOE-50 and ZOE-70 studies.^[18][19]

For a full discussion of timing, side effects, coverage, and special circumstances, see the Shingrix vaccine guide.

When Antivirals Are Not Enough

Antivirals are not a substitute for eye examination, neurologic evaluation, treatment of a bacterial skin infection, or IV therapy when disease is severe. Steroids are not a routine stand-alone treatment for shingles; trial data show they should not delay antiviral therapy or be used without individualized clinical assessment. ^[4][5]

Red Flags: When to Contact a Clinician Now

• Rash on the forehead, eyelid, eye, nose, or scalp
• Eye pain, redness, light sensitivity, or any vision change
• Facial weakness, hearing change, severe dizziness, or vertigo
• Rash beyond one area, lesions crossing the midline, high fever, or severe illness
• Immune suppression, pregnancy, or a newborn exposed to blister fluid
• Confusion, severe headache with neurologic change, weakness, or trouble walking

These situations require a clinician rather than watchful waiting. ^[8][9][21]

Frequently Asked Questions