Postherpetic itch (PHI), like postherpetic neuralgia (PHN), occurs in shingles patients who have persistent nerve damage after the rash subsides. The neuropathic itch condition is caused when the herpes zoster (HZ) virus kills or damages the neurons that mediate normal itch and pain sensations.
How long does itch last with shingles?
Shingles causes a painful rash, itching, and burning skin, and lasts for 3 to 5 weeks in most cases. People usually only experience shingles once, but the infection can recur.
How do you stop the itching from shingles?
To relieve itching and discomfort, try:
- A cool, wet compresses on the affected skin.
- Soothing baths and lotions, such as colloidal oatmeal bath, starch baths, or calamine lotion.
- Zostrix, a cream that contains capsaicin (an extract of pepper)
- Antihistamines to reduce itching (taken by mouth or applied to the skin)
