1) Disease Description (Causes and Symptoms)
- Cause · pathophysiology: The varicella-zoster virus (VZV) remains latent in the sensory ganglia after childhood chickenpox. When cell-mediated immunity weakens, it reactivates, and the virus emerging from the affected ganglion travels along the nerve to the skin, causing local inflammation and nerve damage. It mainly occurs in the dorsal (thoracic) ganglia or in the face (trigeminal nerve).
- Main risk factors: Older age (especially ≥50 years), immunosuppression (chemotherapy, transplantation, use of steroids or immunosuppressants), HIV/AIDS, and stress or acute illness.
- Main symptoms: Pain, tingling, and decreased sensation (neuralgia symptoms) 1–3 days before the rash → erythema and clustered vesicles (blisters) confined to a unilateral skin area (dermatome) develop, and the vesicles crust over within 2–3 weeks. Fever, headache, and malaise may accompany the condition. If pain continues for more than 90 days after the lesions disappear, it is defined as postherpetic neuralgia (PHN). Special forms requiring attention include involvement around the eye (ophthalmic herpes zoster) and involvement around the ear (Ramsay Hunt syndrome).
2) Treatment Methods
- Antiviral medication (early treatment is recommended; the sooner after rash onset, the better, with the greatest effect usually when started within 72 hours)
- Oral: Valacyclovir 1 g 3 times/day for 7 days, famciclovir 500 mg 3 times/day for 7 days, or acyclovir 800 mg 5 times/day for 7–10 days (the dosing schedule depends on the patient's condition).
- For severe disease, immunocompromised patients, or disseminated infection: Hospitalization followed by intravenous acyclovir (e.g., 10 mg/kg IV q8h) is recommended.
- Pain control
- Initial acute pain: Nonsteroidal anti-inflammatory drugs (NSAIDs), acetaminophen, and, if necessary, short-term opioids.
- Neuropathic pain (acute or PHN): Gabapentin, pregabalin, tricyclic antidepressants (such as amitriptyline), topical 5% lidocaine patches, and capsaicin cream/patches (instructions for use must be understood).
- For severe acute pain, consider nerve blocks (epidural or ganglion blocks) or referral to a pain medicine specialist.
- Treatment by complication
- Eye involvement: Immediate referral to an ophthalmologist + concurrent antiviral treatment.
- Ramsay Hunt syndrome (facial paralysis): Consultation with ENT and neurology, antivirals and steroids (at the physician's discretion), etc.
- Vaccination
- Recombinant zoster vaccine (RZV, Shingrix): Generally recommended for adults aged 50 years or older and certain immunocompromised individuals (depending on the physician's judgment). Two doses (2–6 months apart).
- Live vaccine (e.g., Zostavax) is no longer recommended as first-line in some guidelines (varies according to age and condition).
- General supportive care
- Keep the lesions clean and dry, watch for bacterial infection if the vesicles rupture, and avoid contact with high-risk individuals (pregnant women, immunocompromised individuals, and newborns) until the lesions have crusted over.
- Adjust antiviral and analgesic doses according to renal function (creatinine).
3) Checklist Before an Outpatient Visit (What to Prepare and Example Questions)
- Items to bring (recommended)
- Record of when symptoms began (the date the rash first appeared)
- Photos of the lesions (from multiple angles, showing changes by date)
- List of currently used medications (including immunosuppressants, anticoagulants, etc.)
- Medical history: Chronic diseases (diabetes, renal failure, cancer, HIV), recent chemotherapy or transplantation history, and possibility of pregnancy
- Bring recent test results, if available (renal function, CBC, immune status, etc.)
- Allergy history (medications)
- Questions that are helpful to answer in advance at the outpatient visit (for the patient to check personally)
- When did the rash begin?
- What is the severity of the pain (0–10) and its nature (stabbing/burning/continuous)? Is it limited to one side?
- Is there a fever or any systemic symptoms?
- Are there lesions around the eyes or ears?
- Is there immunosuppression (steroids, chemotherapy, transplantation, or HIV)?
- Materials to submit to the medical staff: Medication list, photographs, recent test results, and vaccination history (chickenpox and zoster vaccines)
4) General Examples of Questions to Ask the Doctor
- What are the expected side effects of this medication (antiviral), and what precautions should I take when taking it?
- What is the prognosis for my pain (symptoms)? How likely am I to develop postherpetic neuralgia?
- What precautions should I take regarding daily activities, work, and contact with family members?
- If necessary, when should I return for follow-up or be hospitalized?
5) Examples of Disease-Specific Questions
- I have lesions around my eye (or on the eye itself). What immediate ophthalmology care and treatment are needed to prevent blindness?
- I am taking immunosuppressants (or recently received chemotherapy). Do I need inpatient treatment (IV antivirals)?
- After recovering from shingles, when can I receive the zoster vaccine (Shingrix)? (Please ask about the criteria and timing.)