can I put diaper rash cream under my boob?

So I have this pimple under my boob. And I just left it alone because usually they go away but I sweat under my boobs and it got even bigger so I popped it. 
That freakin hurt. You could hear that thing pop. 
I cleaned it with alcohol and I thought about baby powder but that's kinda messy, do you think diaper rash cream would do the trick? I'm trying to keep it dry and not make it worse.