Comprehensive Symptom Guide for Myalgic Encephalomyelitis (M.E.) Part 1

Purpose

This page provides a structured overview of the wide range of symptoms associated with Myalgic Encephalomyelitis (M.E.) as defined by the International Consensus Criteria. It aims to help patients, carers, and professionals understand the complexity of the illness and its multi-system impact.

Key Points

1. Understanding M.E.

• M.E. is a serious multi-system neurological disease affecting the entire body [Comprehens…lomyelitis | PDF]
• Symptoms vary between individuals and fluctuate in severity
• Illness can worsen following physical, cognitive, or sensory activity

2. Core Feature – Post-Exertional Neuroimmune Exhaustion (PENE)

• A defining characteristic of M.E.
• Symptoms worsen after even minimal activity
• Worsening may be delayed (hours or days later)
• Recovery can take days, weeks, or longer

3. Major Symptom Categories

Neurological and Cognitive Dysfunction

• Cognitive slowing and memory problems
• Difficulty speaking, processing, or concentrating
• Sensory sensitivity (light, sound)
• Dizziness, balance problems, visual disturbances
• Sleep disturbances and emotional instability

Cardiovascular and Circulatory Dysfunction

• Orthostatic intolerance (difficulty standing upright)
• Palpitations, chest discomfort, low blood pressure
• Poor circulation and blood pooling
• Conditions such as POTS or fainting episodes

Muscular and Joint Dysfunction

• Muscle weakness and fatigue
• Pain, spasms, and tremors
• Joint stiffness and mobility issues
• Delayed recovery from physical activity

Sensory Dysfunction

• Visual problems (blurred, double vision, sensitivity)
• Hearing issues (tinnitus, sensitivity to sound)
• Speech and communication difficulties
• Increased sensitivity to environmental stimuli

Gastrointestinal Dysfunction

• Difficulty swallowing
• Reflux, nausea, bloating, bowel irregularities
• Food intolerances and appetite changes

Respiratory Dysfunction

• Shortness of breath or air hunger
• Irregular breathing patterns
• Symptoms worsened by exertion

Sleep Dysfunction

• Unrefreshing sleep
• Difficulty falling or staying asleep
• Disturbed sleep cycles and vivid dreams
• Circadian rhythm disruption

Pain

• Muscle, joint, and nerve pain
• Headaches of various types
• Increased sensitivity to normally non-painful stimuli (allodynia)

Reproductive and Urinary Dysfunction

• Hormonal and menstrual irregularities
• Reduced libido or reproductive symptoms
• Urinary urgency, frequency, or discomfort

Environmental and Sensory Sensitivity

• Sensitivity to:
  • Light
  • Noise
  • Temperature
  • Chemicals
  • Weather changes
• Symptoms may worsen with environmental triggers

Weight and Metabolic Changes

• Unexplained weight gain or loss
• Changes not directly related to diet

Late Effects and Severe Outcomes

• Long-term muscle weakness and cognitive impairment
• Ongoing respiratory and neurological issues
• In rare cases, severe complications such as organ failure

4. Common Co-Occurring Conditions

• Fibromyalgia
• Irritable bowel syndrome (IBS)
• Raynaud’s phenomenon
• Thyroid disorders
• Sleep disorders
• Chronic infections or immune-related conditions

Target Audience

This information is intended for:

• People living with M.E.
• Carers and family members
• Healthcare professionals
• Researchers and advocates

Overall Outcome

This page highlights that M.E. is a complex and multi-system disease affecting nearly every aspect of the body. Understanding the full range of symptoms helps:

• Improve recognition of the illness
• Support accurate diagnosis
• Guide appropriate management strategies
• Validate the diverse and serious nature of patient experiences

Key Summary Statement

Myalgic Encephalomyelitis is a multi-system neurological disease characterised by post-exertional worsening and a wide range of fluctuating symptoms affecting the brain, body, and autonomic systems.