Red Flags and Emergency Protocols

Severely ill children require vigilant monitoring for complications requiring urgent intervention. The threshold for escalation should be lower in pediatrics than in adults.

1 Malnutrition and Feeding Concerns

Severe ME/CFS can impair ability to eat adequately:

  • Contributing factors: Nausea, gastroparesis, food sensitivities, energy cost of eating, cognitive difficulty with meal planning
  • Warning signs: Weight loss \(>\) 10% body weight, BMI declining below healthy range, dehydration

Interventions:

  • Calorie-dense foods: Prioritize high-calorie, high-protein foods that require minimal eating effort
  • Liquid nutrition: Ensure shakes, smoothies if solid food difficult
  • Small frequent meals: 6–8 small meals/snacks rather than 3 large meals
  • Appetite stimulants: Consider mirtazapine (appetite-stimulating side effect) if severely underweight
  • Tube feeding consideration: If unable to maintain adequate nutrition orally and weight loss continues, nasogastric or PEG tube feeding may be necessaryβ€”this is a serious decision requiring specialist involvement

2 Dehydration

Dehydration is particularly dangerous given the importance of blood volume for orthostatic tolerance.

Warning signs:

  • Decreased urine output (less than 3–4 voids/day)
  • Dark urine
  • Dry mucous membranes
  • Worsening orthostatic symptoms beyond baseline
  • Tachycardia at rest

Intervention:

  • Increase oral fluids if tolerated
  • Oral rehydration solutions
  • IV fluids if oral rehydration inadequate or not tolerated

3 Severe Orthostatic Symptoms

OI symptoms requiring urgent evaluation:

  • Syncope (fainting)
  • Near-syncope with falls or injuries
  • Chest pain with activity
  • Palpitations suggestive of arrhythmia (irregular, rapid, or pounding)

These may indicate inadequately treated OI, cardiac arrhythmia, or other cardiovascular pathology requiring workup.

4 Mental Health Crisis

Adolescents with severe ME/CFS are at increased risk for depression and suicidal ideation due to:

  • Loss of functional life, identity, and social connections
  • Chronic pain and suffering
  • Hopelessness about recovery
  • Feeling disbelieved by healthcare providers
WarningPractical Warning: Suicide Risk Assessment

Take ALL expressions of suicidal thoughts seriously. Warning signs:

  • Statements about wanting to die, being a burden, having no future
  • Giving away possessions
  • Withdrawal from remaining connections
  • Sudden calm after period of distress (may indicate decision made)
  • Seeking means (medications, access to weapons)

If suicidal ideation is present:

  • Do not leave child alone
  • Remove access to means (medications, sharp objects)
  • Contact mental health crisis services or emergency department
  • National Suicide Prevention Lifeline (US): 988
  • Crisis Text Line: Text HOME to 741741

Mental health care for suicidal adolescents with ME/CFS requires providers who understand the illness. Psychiatric hospitalization, with its stimulation and forced activity, can worsen ME/CFS and should be avoided if possible through intensive outpatient support.

5 Distinguishing Severity from Concurrent Illness

Severely ill ME/CFS patients may have difficulty recognizing new acute illness (infection, appendicitis, other medical emergency) because chronic symptoms mask new symptoms.

Concerning changes from baseline:

  • New fever (ME/CFS typically does not cause fever)
  • New localized pain (abdominal, chest, flank)
  • Acute worsening of specific symptoms beyond usual fluctuation
  • New neurological symptoms (weakness, numbness, vision changes)

Maintain low threshold for medical evaluation of new symptoms. Do not assume all symptoms are ME/CFS.