Unravelling Fibromyalgia in Psoriatic Arthritis

Area of Science:

• Rheumatology and Pain Medicine
• Neuroimmunology

Background:

• Fibromyalgia is a chronic condition characterized by widespread pain, fatigue, sleep disturbances, and cognitive dysfunction.
• It commonly co-occurs with chronic rheumatic diseases like psoriatic arthritis (PsA), complicating diagnosis and treatment.
• Recent studies indicate a high prevalence of fibromyalgia in PsA patients, significantly affecting their quality of life.

Purpose of the Study:

• To review the interaction between fibromyalgia and psoriatic arthritis.
• To highlight how fibromyalgia symptoms can be mistaken for PsA disease activity, leading to potential overtreatment.
• To discuss diagnostic tools and management strategies for this complex comorbidity.

Main Methods:

• This is a narrative review based on recent studies and clinical observations.
• Utilized tools like the Fibromyalgia Impact Questionnaire and Polysymptomatic Distress Scale for differentiation.
• Examined neurobiological mechanisms and comorbid factors contributing to fibromyalgia in PsA.

Main Results:

• Between 18% and 64% of PsA patients exhibit fibromyalgia symptoms.
• Fibromyalgia significantly elevates reported pain, fatigue, and sleep issues, often inflating PsA disease activity scores.
• Disease activity indices may reflect fibromyalgia symptoms rather than true inflammation, risking overtreatment with disease-modifying drugs.

Conclusions:

• Accurate recognition of fibromyalgia in PsA is crucial for tailored management.
• Distinguishing fibromyalgia from PsA inflammation is essential to guide appropriate pain-modulating and lifestyle interventions.
• Management requires a nuanced approach addressing both central sensitization and inflammatory processes to improve patient outcomes.