I would get some soft wipes from the womens section of say wal-mart in the acne skin care section.Get some for sensetive skin.After the bump goes away and you see a scar,use some lotion like cocoa butter to lessen its appearance.

I have a 2 year old and she breaks out from anything! Food especially. When she is done eating or jsut anytime you want to, yeah get some wipes for sensitive skin and wipe her face. You can alos try to put some vaseline on her just a lil bit though that helps anything moist from getting on her skin and breaking out from that.