Suggest Treatment For Pain In Nipple Of Breast

I am 55, have fully completed menapause without a period in over 5 years. About a week ago my breast near the chest bone felt tender, but for the last few day my actual nipple is super sore. Not the breast at all. If I touch it or brush against it, I am very aware. Almost like a shock kind of hurt. Once I rub it goes away some. The bottom part of the nipple feels like it might be a litle swollen. It is getting worse not better.