Authors: Dr Sarajane Ting, General Practitioner, Wellington, New Zealand; A/Prof Rosemary Nixon, Dermatologist, Melbourne, Australia. Adjunct A/Prof Dr Amanda Oakley, Dermatologist, Hamilton, New Zealand. Copy edited by Gus Mitchell/Maria McGivern. September 2019.
Airborne contact dermatitis refers to acute and chronicdermatitis of exposed parts of the body, especially the face, caused by particles suspended in the air. These particles may include fibres, dust, vapours, sprays, gases, and plant materials.
Contact dermatitis is defined as airborne based on the following factors:
The existence of a volatile or airborne causative agent
Airborne contact dermatitis can affect anyone; it is seen commonly in occupations associated with exposure to known allergens (see DermNet's page on occupational skin disease).
Workers in the following industries are commonly affected:
The sources of airborne contact dermatitis may be occupational or non-occupational. Some common causal agents of airborne contact dermatitis are listed below.
Airborne allergic contact dermatitis
Airborne allergens that can induce allergic contact dermatitis include:
Pine processionary caterpillar (Thaumetopoea pityocampa).
What are the clinical features of airborne contact dermatitis?
The distribution of airborne contact dermatitis is usually symmetrical. The exposed areas are most commonly affected, including the face, dorsal hands, neck, upper chest, and forearms. Eyelid contact dermatitis is common and can be the only affected site. Occasionally, covered areas can also be affected due to the accumulation of airborne particles under the garments.
Common symptoms of airborne contact dermatitis include itching, burning, and stinging.
Airborne contact dermatitis usually presents with diffusescalyerythematousmacules but plaques may also occur. Sometimes a pustular rash can occur as a result of secondary bacterial infection.
How is airborne contact dermatitis diagnosed?
The diagnosis of airborne contact dermatitis can be difficult. The diagnosis relies on taking a comprehensive clinical history, the timeline of the symptoms, consideration of occupational and non-occupational exposures, and finding the characteristic distribution and morphology of the rash on physical examination.
Non-airborne photocontact dermatitis — in contrast to airborne contact dermatitis, non-airborne photodermatitis spares ‘shadow’ areas such as the eyelids, retroauricular folds, and submental regions (the muscles between the chin and the neck)
What is the treatment for airborne contact dermatitis?
The treatment for airborne contact dermatitis depends on the specific cause. After identifying the specific substance causing airborne contact dermatitis, every effort should be made to reduce the exposure to it. A change of job or residence is sometimes necessary to reduce exposure.
What is the outcome for airborne contact dermatitis?
Airborne contact dermatitis can have a significant impact on patients’ quality of life. Complete recovery can often be achieved with avoidance of further exposure, but in severe cases such as Parthenium dermatitis, immunosuppression is often required. Some patients may progress to chronic actinic dermatitis.
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