A chemical relaxer is a hair treatment used to straighten curly or wavy hair. It contains strong chemicals, such as sodium hydroxide or ammonium thioglycolate, which break down the protein structure of the hair. This process allows the hair to be reshaped into a straighter form, making it easier to manage and style. The application of a chemical relaxer typically involves sectioning the hair and applying the product evenly. After a specified time, the relaxer is rinsed out, and a neutralizing shampoo is used to stop the chemical process. Regular maintenance is necessary, as new hair growth will retain its natural texture.