Recurrent HSV infections occur when something triggers the dormant virus, which becomes active again and travels to the skin. Herpetic whitlows develop when the fingers or thumbs touch areas that harbor a HSV infection. People can transfer HSV from infected areas on their own bodies or catch it from someone else. Any break in the skin gives HSV an entry point. Torn cuticles are a common route of infection. HSV-1 causes approximately 60% of herpetic whitlow cases, and HSV-2 accounts for the remaining 40%.

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