If you have thick, curly hair that tends to get frizzy, you can likely get away with washing your hair every 2 or 3 days. If you have an oily scalp, thin hair, and frizz, you may need to wash your hair with a sulfate-free shampoo once a day or once every other day.
Your Water Is Too Hot
Hot water melts away your natural hair oils, leaving it dry, brittle, and frizzy. Excess heat also lifts your hair cuticles, the outermost layer. When that happens, the cells separate and the cuticle layer can't seal itself—another cause of frizzy hair.
If you have frizzy hair
You don't need to wash it more than once a week (you can even stretch it to every 15 days!). It's best to focus on nourishing treatments, ideally, rinse-free masks, serums and conditioners that are formulated with rich ingredients like shea butter, jojoba, argan or monoï oils.
To help control frizzy hair after washing it, first avoid any hair products that contain alcohol. The best ingredients for frizzy hair are nourishing oils like argan oil, avocado oil, and coconut oil.
Since the primary cause of frizziness is dehydration, the best way to stop your hair from being frizzy is to avoid washing with water that's too hot, steer clear of too many heat styling products and harmful chemicals, get a haircut, and use hydrated hair products like shampoo with glycerin, conditioner, leave-in ...
Add moisture.
Only brush curly hair when it's wet, damp, or has a layer of slip between strands and the bristles. Brushing dry hair is an instant recipe for frizz and will loosen your curls right out of shape.
Hair that's wet and filled with moisture is more fragile than hair that's dry, which can result in snapping when brushed. As such, it's recommended to brush hair in a dry state (guide-to-detangling-curls). This may mean allowing your hair to air-dry post-shower before beginning to comb through hair strands.
If you notice your hair is frizzy after you apply conditioner, this may be because you haven't applied it on soaking wet hair. Your hair may also feel frizzy due to a lack of moisture, so you want to apply a deep conditioning masque that will help to prevent dryness.
Frizzy hair appears as rough, dry, unmanageable, and unruly strands. There are different types of frizz that can affect your hair, like surface frizz, halo frizz, in-the-curls frizz, frizzy ends, and pouf ball frizz.
While these terms are often used interchangeably and have similar symptoms, there is a common misconception that frizzy hair means damaged hair and this is simply untrue.
The main cause of frizz is a lack of moisture in your hair. This causes your hair to seek out and absorb moisture from the air, causing frizz - which also explains why humidity can make frizz even worse.
Even for healthy hair, high humidity environments can lead to frizz when your hair absorbs excess moisture. When your hair is dry, frizz can happen when it absorbs moisture from the environment. Over-styling damaging the hair cuticle and causing frizz. Heat damage and styling is another common culprit of frizzy hair.
If you have dry, frizzy hair
A short haircut can do wonders for hair that is on the dryer or frizzier side, but it's important to keep it on the longer side and avoid tons of short layers so that the hair can sit nicely without going poufy.
Depending on your hair texture, frizz may never go away. Also please note that softer hair textures are more prone to frizz, especially the minute any liquid is applied (ie refresher spray).
Moisture overload is a common problem for curly hair. It occurs when protein levels in hair are too low and moisture levels are too high. This imbalance can lead to hair breakage, frizz, and other problems. A common cause of moisture overload is over-conditioning your hair.
On top of breakage, air-drying can also increase frizz, build-up, and mildew, especially for afro-textured and curly hair.
Once you've completely rinsed out the conditioner, refrain from combing or detangling your hair (even with your fingers).