Many times, curly hair is prone to dryness, and therefore frizz. You should be sure you are using a shampoo designed to smooth the hair to fight frizz, and keep your hair well conditioned.   
 You should use a leave-in conditioner and an anti-frizz serum. It will significantly help to keep your hair smooth. Furthermore, I suggest that you give yourself weekly deep conditioning treatments, by applying your favorite conditioner to your hair & covering it with a plastic cap for 15-20 minutes.

To style your curly hair and combat frizz, use a diffuser attachment on your hair dryer and your fingers to lift the hair while drying. Be sure to apply styling gel and anti-frizz serum to the hair to protect it and hold the hair smooth during drying. Just be sure not to let the hair get too dry and break up the curl too much or you’ll still end up with frizz.

~ A