There are many different causes of breast pain. These include cyclical and non-cyclical mastalgia. In cyclical mastalgia breast pain or tenderness changes in response to fluctuating hormones during the menstrual cycle. The exact reason some women experience this, whereas others do not is not well known. Non-cyclical mastalgia, meanwhile, is not tied to the menstrual cycle and can be caused by a range of conditions, trauma, or medications.
