If you have curly hair, chances are you have a love/hate relationship with it (viaiDiva).
Anything from humidity to brushing can leave your hair looking unruly.
Check your shampoo ingredients, and if yours lists sulfates, you should ditch it as soon as possible.

Also,Bustlewarns that you shouldn’t wash your hair too often, even without the sulfates.
A cotton pillowcase could also lead to dry, brittle curls,Function of Beautyreported.
Instead of cotton, which absorbs your hairs' natural oils, try asilk pillowcaseinstead.

Ensure your hair decorations have a safety coating on the tips and aren’t missing any prongs.
Even using the wrong bang out of towel could cause problems (via Bustle).
Finally, a hairbrush could also damage your coils.
Try a wide-tooth comb, and detangle in the shower.