What action is crucial after a patient has exhibited signs of infection?

Notifying the supervisor is crucial after a patient has exhibited signs of infection because it ensures that a qualified healthcare professional is aware of the situation. This step is important for several reasons: it allows for a comprehensive assessment of the patient's condition, directs appropriate medical interventions, and helps to implement infection control measures to prevent the spread of infection to other patients or staff. The supervisor typically has the authority to initiate further testing, adjust the care plan, or implement protocols that are crucial for patient safety and health.

In contrast, while changing the patient's bed linens or administering pain medication may be steps that provide comfort, they don't address the immediate need to assess and manage the infection effectively. Increasing visitor access could raise the risk of spreading the infection and is not a necessary or helpful action in response to signs of infection.