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The lidocaine patch is designed to alleviate itching and pain from minor skin conditions like scrapes, insect bites, and irritations. It is also effective in easing nerve pain associated with shingles, a condition caused by the herpes zoster virus. Lidocaine acts as a local anesthetic, providing temporary numbness to the area of application, which reduces the sensitivity of nerves to pain. Available both over-the-counter and by prescription, the patches come in different strengths: 4% for temporary relief of minor pain and 5% or 1.8% for nerve pain due to shingles. While generally safe, some users might experience mild and short-lived skin irritation. Always consult your healthcare provider for advice on using any medication, as they can give personalized recommendations based on your health needs.