Which term best matches the description: incapacitating exhaustion following only minimal exertion, with fever, headaches, muscle and joint pain, depression, and anxiety?

• A. Lymphedema
• B. Chronic Fatigue Syndrome
• C. Mononucleosis
• D. Systemic lupus erythematosus

Answer: (B)

Chronic Fatigue Syndrome best fits this description. The key is a severe, incapacitating fatigue that follows only minimal effort and is not easily explained by other conditions. This fatigue often comes with flu-like symptoms such as headaches, muscle and joint pain, and can be accompanied by mood changes like depression and anxiety. A hallmark feature is post-exertional malaise—even light activity can worsen symptoms for a prolonged period—and the fatigue significantly reduces daily functioning, even with rest.

Lymphedema is swelling caused by lymphatic blockage, not fatigue. Mononucleosis can cause fatigue, but it’s typically an acute infection with fever and sore throat and resolves over time. Systemic lupus erythematosus can cause fatigue too, but it includes other distinctive signs such as rashes, joint inflammation, and organ involvement. The described cluster of profound fatigue after minimal exertion with these accompanying symptoms most clearly points to Chronic Fatigue Syndrome.