breast bone tenderness Hello all, I've been suffering from tenderness in my breast bone area, directly under my bra strap righ in the middle of my boobs. It's most noticable when I press on the area, feels kind of bruised. Anyone else having or had the same problem? Is it something I should worry about? I have a knot right under my breast bone and at times its sore and I have troble breathing because of it. Dr. Heidi Fowler Dr. Fowler Not: Not exactly sure what you are referring to as a knot. Oct 10, · I have chest/rib cage/breast pain. It hurts to press on those areas. This has been going on for 8 weeks. Could I have Tietzes Syndrome? I am 53 and also suffer from fibromyalgia.