A diffuser hair dryer is a tool that is attached to a hair dryer to disperse the air flow and spread it over a larger area. It is designed to help dry curly hair beautifully or add volume to flat hair by dispersing air through many small air holes over a larger area. A diffuser works by spreading the airstream over a wider area in a more controlled way, which helps to keep the natural curl pattern of curly or wavy hair types. Without a diffuser, you can easily blow curls out of shape and into a frizz.

To use a diffuser, you should attach it to the nozzle of your hair dryer and set the dryer on low speed and heat settings. It is best used when your hair is wet, usually right after washing it. After applying the product evenly throughout your hair, you should flip your hair down and apply the diffuser to the roots. The roots take the longest to dry, therefore, you should start with drying that part of your hair. You can also start by drying your hair all around with the diffuser and then go to the roots. Keep the dryer moving and never let the air stay directed at the same spot for any length of time.

In summary, a diffuser hair dryer is a useful tool for those with curly or wavy hair types. It helps to keep the natural curl pattern of the hair and adds volume to flat hair. To use it, you should attach it to the nozzle of your hair dryer and set the dryer on low speed and heat settings.