What makes hair frizzy?

I have straight hair but when I let my hair dry normally after a shower, it always goes frizzy. Why?? Thanks for any help on this.

In some cases it is due to your hair shaft being dry, and having split ends. The hair shaft is not a smooth surface, it is made up of several ‘scales’ of cells. When these scales are dry, they do not lay flat on one another, and the result is frizzy-looking hair.

Hot oil treatments will temporarily stop frizzies. There are also anti-frizz products on the market.