Hair curls in the back

[haganah]

I usually have very short hair but I'm growing it out a bit more based on the haircutters advice.

As it grows longer (not even that long), the hairs on the back have started to curl.

I think it looks weird. He claims it's fine. I really just want it to stop curling...

Has anyone else had this issue and how do you fix it?

 

[clarity]

Blow drying it may help. Also don't use shampoo as much. Mine is on the longer side(bangs cover my entire face if I let them) and the natural oils help to weigh it down so to speak. I condition it and rinse it daily, but only shampoo once or twice a week. It's not gross or anything. The ends of mine always curve up a little bit though. But I don't mind.