Final answer:
The appropriate nursing intervention for a male client with a herniorrhaphy and scrotal edema and pain is to elevate the scrotum on a small pillow.
Step-by-step explanation:
The appropriate nursing intervention for a male client who has undergone a herniorrhaphy for an incarcerated inguinal hernia and is experiencing pain and edema of the scrotum is to elevate the scrotum on a small pillow (option c). Elevating the scrotum can help reduce edema and promote fluid drainage, thereby relieving pain and swelling. Applying an ice pack to the scrotum (option a) may help with pain management but may not directly address the edema. Encouraging frequent ambulation (option b) may be beneficial for overall recovery but may not specifically target the edema of the scrotum. Applying a warm compress to the scrotum (option d) may provide some temporary relief but may not be as effective as elevation for reducing edema.