Postpartum Pain Management in a New Mother

A 28-year-old woman has just given birth to her first child via spontaneous vaginal delivery without complications. Her postpartum assessment shows that she has a firm uterus located at the umbilicus, and her lochia is moderate, bright red in color. The client expresses concern about experiencing significant abdominal pain intermittently.

Which nursing intervention would be most appropriate for managing her abdominal pain in the postpartum period?