SplintER Series: Point Tender

A 42-year-old female presents to the emergency department with complaints of worsening finger pain. She reports the pain started 2 days ago with redness at the tip of the finger. Over the past 24 hours, her redness has spread and the finger has become more painful. On arrival, she is afebrile and hemodynamically stable. She has the below exam findings with tenderness along the volar aspect of the finger and pain with passive extension (Figure 1). What is your suspected diagnosis? What is your initial workup? What is your management and disposition?