Normally, if breast pain occurs before each menstrual period, it is generally considered that menstruation is approaching. However, some patients may also experience breast pain in the early stages of pregnancy. This type of pain usually occurs when the menstrual period does not arrive as expected, and at this time, the breast pain might be due to pregnancy. In such cases, it is advisable to visit a hospital for early pregnancy tests to obtain a clear diagnosis. If the test results indicate that pregnancy is not the cause of the breast pain, then it is likely that menstruation is approaching. Some patients may experience breast pain due to liver qi stagnation before their period, which is considered a pathological state and generally requires medication for symptomatic treatment. If pregnancy tests are negative and breast pain occurs, it is highly likely that menstruation is imminent.