Will an underwire bra will help with the breast rolls under my breasts? (photos)

I had breast reduction surgery in May 27, so today I'm two-weeks post-op. On the one week post op visit my surgeon instructed me to start wearing an underwire bra. I have what I call ripples of skin under both breasts. Is this normal? Why do I have the excess skin rolls and is the underwire going to help with this?