A patient has been recently diagnosed with chronic fatigue syndrome and asks the nurse about the cause of this illness. What is the nurse's best response?

A) "The provider will be able to tell you when the lab results are back."
B) "An exact cause may not be determined, but a treatment plan will be discussed."
C) "Stress is the main cause; a referral to a counselor may be helpful."
D) "This is considered a psychiatric illness requiring behavioral medicine."

Chronic Fatigue Syndrome

A complex disorder characterized by extreme fatigue that can't be explained by any underlying medical condition and is not relieved by rest.

Psychiatric Illness

A broad category of mental health disorders that affect mood, thinking, and behavior, requiring clinical diagnosis and treatment.

Behavioral Medicine

An interdisciplinary field combining both medicine and psychology to develop interventions for improving health and treating illness through behavioral changes.