How Is Hailey Hailey Disease Treated?

I have had Hailey Hailey now for 8 months on neck, groin, and under arms. Nothing my dermatolgist has prescribed has worked and every cream I use only makes the condition worse. Prednisone is the only thing that helps but, i don't want to keep taking this. Is there a safer alternative to take than the prednisone?