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Astma-Allergi Danmark har påtaget sig at videreføre rådgivningen som en udvidelse af foreningens eksisterende tilbud til mennesker med følsomme luftveje. Det er muligt at ringe til Astma-Allergi Danmark på alle hverdage fra kl. 10-12 og tillige om onsdagen fra kl. 16-18. Astma-Allergi Danmark har integreret viden om duft- og kemikalieoverfølsomhed på foreningens hjemmeside Det ligger fra forsiden under overskriften MCS og kan findes her:


Doctors diagnose diseases on the basis of the symptoms their patients describe and what they can observe from objective tests, such as blood tests and other medical examinations.


In the case of multiple chemical sensitivity (MCS) it has so far not been possible to identify specific objective signs and symptoms and there are therefore no objective tests that can determine whether a patient has MCS.


Classification of MCS in Denmark
In July 2012 a new classification code for MCS was published in the Danish healthcare classification system, which is administered by the Danish Health and Medicines Authority. In Denmark the Danish Health and Medicines Authority is the supreme authority in healthcare and regulatory control of medicines.


The name of the code is "Symptoms related to scents and chemicals" and it is placed under the main category "Medically unexplained symptoms" (DR688A), which is a specialization of the ICD-10 code “R68.8 Other specified general symptoms and signs”. The overall purpose is to register hospital contacts for patients who report these symptoms in Denmark.


The code is purely descriptive and without any assumptions about the pathophysiology of the symptoms. The classification and criteria were decided with reference to the present lack of scientific understanding of the factors involved in the development and course of the symptoms.


The following 5 criteria must be fulfilled:  

  • Symptoms are attributed to common scents and chemicals, e.g. fragranced products, freshly printed papers or magazines, tobaco smoke and new furniture.
  • Symptoms from the central nervous system such as headache, dizziness, concentration difficulties and exhaustion are mandatory. In addition symptoms from other organ systems are often reported, e.g. from the mucosa/respiratory tract, musculo-skeletal system and gastro-intestinal tract.
  • Symptoms improve or are resolved when exposures are removed.
  • The condition is chronic (of at least 6 months duration)
  • Symptoms are associated with significant life-style or functional impairments, e.g. loss of job or social network.


References: Lacour M et al. Int J Hyg Environ Health 2005; 208: 141-151; Multiple Chemical Sensitivity: A 1999 consensus. Arch Environ Health 1999; 54: 147-149.


Definition of MCS
Various definitions of MCS are used when the illness is described scientifically.


Read about the most common definitions.


The Danish Research Centre for Chemical Sensitivities does not diagnose MCS but is open to questions from physicians, municipalities etc.

Be aware of other diseases

Studies have shown that MCS often occur simultaneously with diseases such as asthma, hay fever, eczema and depression.

It therefore makes sense to look out for these diseases, if symptoms include coughing or itching, or if the person is experiencing sadness for a long time.


Doctors will typically try to exclude diseases that can cause symptoms similar to MCS.

The Danish Research Centre for Chemical Sensitivities | Ledreborg Allé 40, 2 | DK-2820 Gentofte | Phone + 45 39 77 73 04 | Last updated 24.10.12 | Contact web editor
The Research Centre is funded by the Danish Environmental Protection Agency and is a part of the Department of Dermato-Allergology at Copenhagen University Hospital, Gentofte