Perm hair before and after are two distinct physical presentations of a hairstyle after a permanent wave (perm) chemical treatment. Perms are applied to hair to create curls or waves, offering more volume and longevity compared to non-permanent styling methods.
First developed in 1905 by German hairdresser Karl Nessler, perming involves treating hair with a chemical solution to break down its structure, followed by shaping it around rods to create the desired curl pattern. Today, perms offer a range of curl sizes and styles, making them versatile options for various hair types and preferences.