What potential issue can arise from applying a perm to wet hair?

When a perm is applied to wet hair, one potential issue that can arise is the development of inconsistent curl patterns. This happens because wet hair can alter the way the perm solution interacts with the hair strands. The moisture from wet hair can dilute the perming solution, leading to uneven absorption of the chemicals required to break down the hair's natural structure. As a result, some sections may curl tightly while others may not curl effectively, producing an uneven or unpredictable texture throughout the hair.

In contrast, applying a perm to dry hair allows for better control and more uniform results. Dry hair will allow the perm solution to work effectively across all strands, ensuring that each part of the hair processes evenly, which is essential for achieving the desired look. Therefore, consistent application and the correct state of the hair are critical for successful perming results.