Final answer:
The most likely cause of postpartum edema in the lower extremities is normal fluid shifts that occur after childbirth.
Step-by-step explanation:
The most likely cause of the postpartum client's bilateral lower extremity edema is normal postpartum fluid shifts. Edema can occur after childbirth due to hormonal changes and the redistribution of fluid in the body. It is common for women to experience swelling in the extremities, including the lower legs and feet, after giving birth.
During pregnancy, the body retains extra fluid to support the developing fetus. After childbirth, the body gradually eliminates the excess fluid through urine and sweat. As the fluid shifts, it can accumulate in the lower extremities, resulting in edema.
It's important for the nurse to monitor the edema and assess for any signs of worsening or accompanying symptoms. The nurse can also recommend elevating the legs, wearing compression stockings, and staying hydrated to help reduce the edema.