How Effective is Cortisone with Accutane?

I have been on RoAcuutane for 20 days & my face got worse with flare up skin (see pic) now my doctor put me on steroid "predinsone" to help with the flare up. How effective this is? Would i gain a lot of weight? would i get red of the pain and the white heads and swollen jaw lines?

No doctor answers yet