A perm, short for "permanent wave," is a chemical treatment that alters the hair's structure, resulting in defined curls or waves. For fine hair, perms offer a solution to add volume, texture, and movement that can be challenging to achieve naturally.
Perms have evolved since their introduction in the early 20th century, becoming more advanced and less damaging over time. Modern perms utilize gentler formulas and techniques, allowing for natural-looking and long-lasting results.