My new bmx bikes handle bars are hurting my the palms of mu hand. Help?

[WAZ]

I got a new bmx bike. At first i rode it well and it was fine. The handle bars rubber is very rough/grippy. And when i hold them they make the bottom inner part or the surface of my palm go read and sting alot, its as if someone is pinching my palm when i hold my bikes handle bars.

Can anyone tell me how i can fix this problem?
If necesery, do u have to buy new handle bars that are smoother and more compfterble?
Thanks