What is a primary risk if a perm solution is not evenly distributed?

The primary risk of not evenly distributing a perm solution is that it can lead to an uneven curl pattern. A perm works by altering the structure of the hair through a chemical process. When the solution is applied inconsistently, certain sections of hair may absorb more of the chemical while others may absorb less. This can cause some parts of the hair to curl tightly while others may remain straight or have a different curl pattern, resulting in an overall uneven appearance. A well-distributed perm solution ensures all sections of the hair receive the same treatment, leading to uniformity in the curl pattern and overall aesthetic.