The cause of frizzy hair is as simple as the above (with a little humidity thrown in the mix), but the fix, unfortunately, isn't as easy. And because the severity of your frizz, thickness of your hair and climate you're exposed to on a daily basis isn't the same as everyone else's, there are several ways to fight it.
This week, do some trial and error to find out which of the below six methods (or combination of methods) works best for you.
A Weekly Conditioner Trick: You've been trained to always shampoo then conditioner, but if hair frizz is a serious problem, twice a week, only use conditioner. Apply it evenly like normal, then rinse it out—it contains a small amount of surfactants (a hair-cleansing ingredient), so it'll do the cleaning you need without stripping your hair of its natural oils.
Immediate After-Shower Care: Before you take a blow-dryer to it, let your hair air dry about 90 percent of the way. Too much hot air dehydrates your locks, making it frizzy.
Mask It: At least once a week, do your hair a favor and use a hydrating mask (especially in the colder months when the air is less humid).
If You Like Piña Coladas and Getting Caught in the Rain: If you like getting caught in the rain, chances are your frizz problem is minimal. But if you're the type whose hair is bound to pouf after strolling through a sun shower, hair serum will be your best friend. Apply it over your trouble spots then secure your hair into a bun while it's still damp to smooth it back down.