What can occur when moisture is trapped between a nail enhancement and natural nail?

When moisture is trapped between a nail enhancement and the natural nail, it creates an environment conducive to bacterial growth. Bacteria thrive in warm, moist settings, and this situation can lead to infections. The close proximity of the enhancement to the natural nail inhibits air circulation, allowing stagnant moisture to persist, which can further encourage the proliferation of bacteria.

While other options like fungal infections or nail discoloration might seem relevant, they typically arise from different conditions or sources. Fungal infections generally result from persistent exposure to moisture and specific fungal spores, and allergic reactions may occur due to sensitivities to products rather than the trapped moisture itself. Thus, the scenario most directly linked to trapped moisture is the potential for bacterial growth, making it the correct choice.