A perm treatment, short for permanent wave, is a chemical process used to create curls or waves in hair. This technique involves applying a chemical solution to the hair, which alters its structure, allowing it to hold a new shape. The hair is then wrapped around rods or curlers, and heat is often applied to set the curls. The results of a perm can last several months, depending on hair type and care. There are different types of perms, including digital perms and acid perms, each offering various styles and effects. Proper maintenance is essential to keep the curls looking their best.