Breast pain can vary in intensity and is typically felt as tenderness, burning, a sharp stabbing pain, or as an aching heaviness. It may occur in both breasts, one breast, or in the underarm area. Up to 70% of women will have breast pain (mastalgia) at some point in their lives, although only around 15% will require medical treatment.
This is a companion discussion topic for the original article at https://patient.info/news-and-features/reasons-your-breasts-are-hurting