I Am A 75 Year Old Woman. I Wear Underwire

I am a 75 year old woman. I wear underwire bras. I have pain at the bottom of my breast, which I thought was irritated from the bra. the pain has spread around to my side, it is a burning sensation and quite painful. there is no rash on the outside. it has been like this for about a week. ice seems to help a little.