For those with curly, wavy hair that is prone to frizz, straightening it can give it a sleek, smooth look. There are some tips to keep in mind when straightening frizzy hair in order to get the longest lasting results. It is best to begin by treating the hair while in the shower with a moisturizing shampoo and conditioner, followed by a leave-in smoothing and conditioning treatment upon getting out of the shower. Experts generally recommend drying the hair in sections, wrapping it around a round brush to make it smooth. To finish straightening frizzy hair, it might be necessary to use a flat iron or straightener to smooth the hair.
Treating hair well in the shower is the first step to straightening frizzy hair. Moisturizing shampoo and conditioner can help to smooth the hair shaft, and really help to reduce frizz. Upon exiting the shower, wrap the hair in a towel and squeeze to remove excess water, but don't rub, as this can create more frizz. Most people will then apply a leave-in conditioner to combat frizz. It may be a good idea to use one that is specially designed for frizz and to protect the hair from heat styling.
If a person has very thick hair, it might be a good idea to divide the hair into sections using clips, and then dry it in these sections, working from the inner layers to the top layers. Those with thinner hair may be able to just dry it all at once. In general, it is a good idea to use a large, round brush to twist the hair around and direct the blow dryer. Don't direct the blow dryer up the hair shaft or at the scalp, which will create frizz. Repeat this process all around the head until hair is completely dry.
Some people can stop here if hair is acceptably straight, while others may need to use a flat iron as the final step in straightening frizzy hair. The flat iron can be very damaging to the hair, potentially creating frizz later, so it is best to use it on a lower heat setting, and only as often as necessary. One very important tip to keep in mind for straightening frizzy hair is to "set" any style with a blast of cool air. Many new hair dryers have this setting, and it really helps to set the style, make it last all day, and preventing frizz.