Review symptoms: widespread pain, fatigue, unrefreshing sleep, cognitive difficulties, and tenderness
Check symptom duration: symptoms present for at least 3 months
Assess pain distribution across both sides of the body and above and below the waist
Obtain a detailed medical history and physical examination
Evaluate sleep quality, mood, stress, and functional impact
Rule out other conditions with similar symptoms
Order targeted tests if needed to exclude other causes
Consider blood tests such as CBC, ESR, CRP, thyroid function, vitamin D, and B12
Assess for autoimmune, inflammatory, endocrine, or neurologic disorders when indicated
Use fibromyalgia diagnostic criteria based on widespread pain index and symptom severity
Confirm that symptoms are not better explained by another diagnosis
Refer to a rheumatologist or specialist if diagnosis is unclear
Reassess over time if symptoms change or new signs appear