Voice Changes and Phlegm During Fibromyalgia Flares
Voice changes and increased phlegm production during fibromyalgia flares are likely related to the syndrome's widespread effects on the respiratory system, autonomic dysfunction, and inflammatory processes, though these symptoms are not formally recognized as core fibromyalgia manifestations in current guidelines.
Understanding the Connection
The EULAR guidelines 1 identify pain, fatigue, sleep disturbance, mood changes, and cognitive impairment as the primary symptoms of fibromyalgia, but explicitly note that fibromyalgia is "heterogeneous and complex" with symptoms that vary between individuals. Your voice and phlegm symptoms fall into this broader symptom pattern.
Evidence for Voice Changes in Fibromyalgia
Recent research demonstrates a clear link between fibromyalgia and voice disorders:
- A 2024 study found that 37% of fibromyalgia patients had clinically significant voice complaints (VHI-10 score >11) compared to none in healthy controls 2
- Voice problems correlated strongly with both fibromyalgia severity and pain intensity 2
- The mechanism likely involves respiratory muscle weakness and altered thoracic mobility that affects voice production
Respiratory System Involvement
Multiple studies document respiratory dysfunction in fibromyalgia that could explain both voice changes and phlegm sensation:
- Reduced respiratory muscle strength: Decreased maximal inspiratory pressure and maximal expiratory pressure 3, 4
- Impaired chest expansion: Particularly at axillary and xiphoid levels, with compensatory abdominal breathing 4
- Reduced maximum voluntary ventilation: Indicating overall respiratory endurance problems 3, 4
These respiratory changes can create a sensation of phlegm or throat congestion even without actual mucus production.
Upper Airway and Sinus Involvement
Research identifies additional relevant associations:
- Chronic rhinitis and sinus problems occur more frequently in fibromyalgia patients 5, 6
- The pathophysiology involves inflammatory cytokines (IL, TNF-alpha) and nerve growth factor that affect both pain processing and upper airway function 5
- Chronic cough is reported significantly more often in fibromyalgia patients 6
Clinical Implications During Flares
During fibromyalgia flares, central nervous system hyperresponsiveness intensifies 7, which can amplify:
- Sensory perception of normal throat secretions (making them feel excessive)
- Respiratory muscle fatigue (affecting voice quality and creating hoarseness)
- Autonomic dysfunction (potentially altering mucus production or clearance)
Important Caveats
While these symptoms appear related to fibromyalgia, the hoarseness guideline 8 emphasizes that persistent voice changes warrant evaluation to exclude other causes, particularly if you:
- Smoke or have a history of tobacco use
- Have had recent neck/chest surgery or intubation
- Notice a neck mass
- Experience breathing difficulty or stridor
If your hoarseness persists beyond 2-3 weeks or worsens, seek direct laryngeal examination to rule out structural lesions, vocal fold pathology, or medication effects 8.
Management Approach
Based on the evidence:
- Exercise remains the strongest evidence-based intervention for fibromyalgia overall 1, and respiratory muscle training may specifically help voice and breathing symptoms 4
- Address the underlying fibromyalgia flare with your established management plan
- Consider evaluation by an otolaryngologist if voice symptoms are severe or persistent
- Stay hydrated, as dehydration can worsen both voice quality and mucus thickness
- Avoid throat clearing, which can worsen voice symptoms
The correlation between voice problems and fibromyalgia severity 2 suggests that better overall fibromyalgia control should improve these symptoms.