Cited by 121Psychosomatic Disorders and Their TreatmentsPain Management and Placebo EffectNoise Effects and Management

Idiopathic Environmental Intolerance: A Comprehensive Model

Open access
Van den Bergh, Omer, Brown, Richard J., Petersen, Sibylle, Witthöft, Michael·2017·Clinical Psychological Science

Abstract

Idiopathic environmental intolerance refers to a group of poorly understood health conditions characterized by heterogeneous somatic symptoms that occur in response to environmental triggers, but for which no physiological causes can be found. We focus on three varieties, namely symptoms attributed to (a) chemical substances, (b) electromagnetic fields, and (c) infrasound and vibroacoustic sources. As no clear link with organ pathology or dysfunction has been established so far, we review critical evidence about alternative causal mechanisms as a platform for a novel unifying model of these conditions. There is consistent evidence that expectancy and nocebo mechanisms are critically involved. Using recent predictive coding models of brain functioning, we describe a comprehensive new model to explain how symptoms come about and become linked to specific environmental cues. This new model integrates phenomenally different pathologies, suggests testable new hypotheses, and specifies implications for treatment.

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  • Disabling PPS, manifesting as building-related environmental intolerance, has a biopsychosocial nature, emphasizing symptom perception, awareness, and interpretation rather than organic or toxicological causes.

    “Research has revealed that disabling PPS, manifesting as building-related environmental intolerance, has a biopsychosocial nature, emphasizing symptom perception, awareness, and interpretation rather than organic or toxicological causes [12, 13, 15].”

    From Work Ability and Functioning Among Individuals with Persistent Indoor Environment-Related Symptoms or Chronic Fatigue: Nine-Month Follow-Up of a Web-Based Randomized Controlled Trial. (2026) · cites this paper as [12]

    The Biopsychosocial mechanisms section links environmental-intolerance symptoms to exposure awareness and expectations, and the Summary says compelling evidence for an underlying disease process or physiological trigger–symptom association is absent in the conditions reviewed. But on p. 5 the authors say Sick Building Syndrome is not discussed directly, although they believe their model applies to it. The Sources of Symptoms in IEI section also allows that symptoms can begin with a toxic exposure, so the claim’s building-specific and categorical ‘rather than organic or toxicological causes’ wording goes beyond the source. (LLM, conf=0.88)

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  • Excessive central nervous system reactivity and related illness worry (IW) may be seen as core features of PPS and they often overlap.

    “Excessive central nervous system reactivity and related illness worry (IW) may be seen as core features of PPS and they often overlap [12, 16].”

    From Work Ability and Functioning Among Individuals with Persistent Indoor Environment-Related Symptoms or Chronic Fatigue: Nine-Month Follow-Up of a Web-Based Randomized Controlled Trial. (2026) · cites this paper as [12]

    In “A common mechanism?” (page unavailable), the paper describes enhanced responsivity as central to the forms of idiopathic environmental intolerance it discusses. In “Providing Alternative Priors for Low Precise Prediction Errors” (page unavailable), it says illness worry may chronically activate stress-response systems and symptom-related mental models. It does not establish these as core features of PPS generally or show that nervous-system reactivity and illness worry often overlap. (LLM, conf=0.82)

    Experimental — accuracy not yet measured

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Research works printed but not linked: 3

  1. INFAS (Institute for Applied Social Sciences). (2006). Identifying the general public's fears and anxieties with regard to the possible risks of high frequency electromagnetic fields of mobile telecommunications (survey 2003, 2004, 2005, 2006). Complete report [in IDIOPATHIC ENVIRONMENTAL INTOLERANCE 40 German]. Available at: TODO: clickthrough URL http://www.emf- forschungsprogramm.de/forschung/risikokommunikation/risikokommunikation_abges /risiko_021.html
  2. Pennebaker, J. W. (1995). Beyond laboratory-based cardiac perception: Ecological interoception. In D. Vaitl, & R. Schandry (Eds.), From the heart to the brain. The psychophysiology of circulation -Brain interaction (pp. 389-406). Frankfurt: Peter Lang.
  3. Winters, W., Devriese, S., Van Diest, I., Nemery, B., Veulemans, H., Eelen, P., … et al., (2003). Media warnings about environmental pollution facilitate the acquisition of symptoms in response to chemical substances. Psychosomatic Medicine, 65, 332-338. doi: 10.1097/01.PSY.0000041468.75064 · DOI

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Authors
Van den Bergh, O., Brown, R. J., Petersen, S., & Witthöft, M.
Affiliations
  • Health Psychology, University of Leuven, Belgium
  • Greater Manchester Mental Health NHS Foundation Trust (GB)
  • University of Luxembourg (LU)
  • Johannes Gutenberg University Mainz (DE)
Venue
Clinical Psychological Science
Published
2017-05
Volume
5
Issue
3
Pages
551-567
ISSN
  • 2167-7026 (ISSN-L)
  • 2167-7034
OpenAlex
W2593754217
Cited by
121
References
127
Citations by year
2026: 7 · 2025: 10 · 2024: 11 · 2023: 6 · 2022: 11 · 2021: 8 · 2020: 47 · 2019: 8 · 2018: 6 · 2017: 7
FWCI
15.35
Type
journal article
Language
en
Open access
Locations
  • Clinical Psychological Science (publishedVersion)
  • Open Repository and Bibliography (University of Luxembourg) (submittedVersion, other-oa)
  • Research Explorer (The University of Manchester) (submittedVersion, other-oa)
  • Lirias (submittedVersion)
Funders
Fonds National de la Recherche Luxembourg
Topics
  • Health Sciences › Medicine › Psychiatry and Mental health › Psychosomatic Disorders and Their Treatments
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Pain Management and Placebo Effect
  • Health Sciences › Health Professions › Speech and Hearing › Noise Effects and Management
Keywords
multiple chemical sensitivity, electromagnetic hypersensitivity, infrasound, somatic symptoms, environmental triggers, expectancy, nocebo, predictive coding, causal mechanisms, therapeutic implications

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