A "Perm," short for permanent wave, is a chemical hair treatment that creates curls or waves in straight hair. This process involves applying a chemical solution to the hair, which alters its structure, allowing it to hold a new shape. The results can last for several months, depending on hair type and care. The perm was popularized in the 1980s and has since evolved with various techniques and styles. Modern perms can create loose waves or tight curls, catering to different preferences. Many people choose perms to add volume and texture to their hair without daily styling.