When a client with diabetes reports breast tenderness and urinary frequency, what is the most important action for the nurse?

When a client with diabetes reports symptoms such as breast tenderness and urinary frequency, it is crucial to prioritize monitoring and managing their blood sugar levels, as these symptoms can be indicative of various conditions, including pregnancy, hormonal changes, or hyperglycemia.

Reviewing the client's home blood sugar logs allows the nurse to assess whether the client’s blood glucose levels are within the target range. Poorly controlled blood sugar can lead to complications for the client and the developing fetus if pregnancy is involved. Therefore, understanding the client’s glycemic control is essential for determining the appropriate next steps in care.

While other options like asking about breast self-exams, characteristics of vaginal discharge, or the last menstrual period may provide useful information, they do not directly address the immediate concern related to the client's diabetes management and potential complications that can arise from fluctuating blood glucose levels. As such, prioritizing the review of blood sugar logs is vital to ensure the client’s safety and well-being.