Permanent hair straightening is a cosmetic procedure that alters the structure of curly or wavy hair to make it straight. This process typically involves the use of chemical solutions, such as keratin or sodium hydroxide, which break down the hair's natural bonds. After applying the chemicals, heat is often used to reshape the hair, resulting in a sleek, straight appearance that can last for several months. The treatment is popular among individuals seeking low-maintenance hairstyles, as it reduces the need for daily styling. However, it is essential to consider potential damage to the hair and scalp, as well as the need for regular touch-ups to maintain the straightened look.