Coexisting Fibromyalgia with Hypothyroidism and Osteoarthritis

Diagnostic Considerations

When evaluating patients with hypothyroidism and osteoarthritis who have persistent pain, the possibility of coexisting fibromyalgia should be considered, especially when symptoms seem disproportionate to objective findings 1, 2

Widespread pain that extends beyond the expected distribution of osteoarthritis 1
Pain that seems disproportionate to objective findings on imaging or laboratory tests 2
Symptoms suggestive of active inflammatory disease despite normal inflammatory markers 1, 3

Assess for tender points in characteristic locations 4
Consider that normal muscle enzyme levels (CK) generally differentiate fibromyalgia from inflammatory myopathies 4
Ultrasonography may help distinguish between inflammatory arthritis activity and non-inflammatory pain when clinical assessment is unclear 2, 3

The presence of fibromyalgia can complicate assessment of disease activity in patients with inflammatory conditions 1, 3
Composite disease activity indices should be interpreted with caution in patients with coexisting fibromyalgia, as they may overestimate inflammatory disease activity 3

When fibromyalgia coexists with hypothyroidism and osteoarthritis, all conditions should be addressed appropriately 2, 5
Escalation of disease-modifying therapy for inflammatory conditions should not be based solely on symptoms that may be attributable to fibromyalgia 1, 2
Non-pharmacological approaches including education, exercise, and self-management strategies are particularly important when treatment options for comorbid conditions are limited 3
Osteoarthritis pain and fibromyalgia pain may require different treatment approaches 6
The presence of fibromyalgia should not lead to dismissal of potentially active inflammatory disease; careful assessment is needed 1, 2