5. DON’T PUT UP WITH PAIN.
Your bra should never hurt. If the wire is burrowing into your flesh underneath your arm (ouch!), it’s because your cup size is too small. “The ‘smile’ of the wire needs to be completely around the breast, never digging into your breast,” says Altman. In fact, most women need to go down one band size and up one cup size to get more comfortable.