Review symptoms: widespread pain, fatigue, sleep problems, cognitive difficulties
Check symptom duration: symptoms present for at least 3 months
Assess pain distribution: pain on both sides of the body and above and below the waist
Evaluate tenderness and sensitivity to touch
Take a detailed medical history
Perform a physical examination
Rule out other conditions with similar symptoms
Order blood tests if needed to exclude thyroid disease, anemia, inflammatory disorders, or vitamin deficiencies
Consider sleep disorders, depression, anxiety, and autoimmune diseases in the evaluation
Use fibromyalgia diagnostic criteria based on widespread pain index and symptom severity
Confirm that symptoms are not better explained by another diagnosis
Consult a rheumatologist or other specialist if diagnosis is unclear