Shingles, also known as herpes zoster, is a viral infection caused by the varicella-zoster virus.

This is the same virus that causes chickenpox and can reactivate years later.

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Reactivation is more likely in those with weakened immune systems, over 50, or under stress.

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Medical treatments like chemotherapy and conditions like HIV/AIDS also increase the risk.

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Early symptoms include tingling, itching, or burning.

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Complications include postherpetic neuralgia (PHN), persistent nerve pain, and bacterial infections.

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