
There's a lot of hype over whether a blow dryer can cause significant damage to hair. While it is certainly not recommended that style seekers perform a blow out everyday, proper technique and careful attention can reduce the negative affects of blow drying, and will enhance the look of your hair every single time!
Make use of the "cool" button. A lot of dryers these days have a cold setting, which cuts off the heat from the dryer and directs room temperature air at your hair. Experts say that while the hot settings open the hair cuticles and allow for styling, the cooler setting closes up the cuticles to set the dried hair in place, whether curly or straight. If you have time, it is recommended that you heat style, and then cool each chunk of hair that you work with individually.
Break out the diffuser. When I first got my new blow dryer, I carelessly tossed aside the strange, clunky attachment with a dozen outstretched fingers thinking, "What the heck could this be for?" But if you have curly or wavy hair and want to encourage natural volume while eliminating frizz, attach the diffuser and make sure your hair dryer is on the lowest heat and intensity settings. Settings left too high can damage the diffuser. Start at the root and move in deliberate circles. You'll notice that the heat is more widely spread throughout your hair, hitting the scalp in a range much broader than a dryer without the attachment. To use the diffuser on the ends of your hair, set the ends into the fingers of the diffuser and gently weave upwards, like you might do if you were "scrunching" the hair with your fingers.
Take your time, and separate the hair into sections. If you attack your hair straight out of the shower without a plan, you'll probably run into some tangly trouble. But prepping your hair for drying, and allowing ample time to get the job done, will give you a professional looking blowout. Make sure the hair is not still sopping. Wave the dryer near the scalp and under heavy folds of hair near the top of your head to reduce wetness just a little. Then, depending on how much hair you have, separate the hair into sections. For me, it helps to separate my hair into two or three vertical sections. This means I let about a third of my hair (the bottom section closest to my neck) hang, clip the rest out of the way, and blow it out before moving to the middle section, and then to the top of the head where the hair is parted. Bands or clips should be used to keep the sections you aren't working with at the moment away from the hair you are drying. But make sure these accessories don't leave stripes or wrinkles in newly dried hair. This can ruin a straight blowout, or funk up some of your perfect waves.