People at risk:
(1) occupational (miners, farmers, etc)
(2) other people spending time outdoors
(3) anyone around animals
(4) anyone in an environment with unfiltered or poorly filtered air
Airborne allergens may include:
(1) pollen or other plant parts
(2) animal dander
(3) metals or chemicals
Clinical features:
(1) dermatitis involving the eyelids, nasolabial folds and other areas of the face and neck
(2) dermatitis involving uncovered areas where dust may deposit - upper chest, distal extremities or anyplace else "sun-exposed"
(3) dermatitis at the edges of clothing where dust may accumulate
(4) dermatitis at areas where sweat accumulates (flexural areas)
(5) variable allergic rhinitis
(6) variable asthma
Airborne allergens may be associated with:
(1) urticaria
(2) photodermatitis (if the airborne allergen is light-activated)
(3) skin abrasions (contact irritation)
The differential diagnosis includes
(1) other types of contact dermatitis
(2) photodermatitis
(3) contact irritants
