Creosote: acts as a contact irritant, sensitizer, and photosensitizer
Asphalt/Tar Products
Spurge Plants
General Comments: produce irritating white milky sap
Candelabra Cactus
Euphorbia Milii (Crown of Thorns, Christ Plant, Christ Thorn) (see Euphorbia Milii, [[Euphorbia Milii]])
Euphorbia Pulcherrima (Poinsettia) (see Euphorbia Pulcherrima, [[Euphorbia Pulcherrima]])
Euphorbia Tirucalli (Firestick, Pencil Cactus, Pencil Tree, Aveloz, Indian Tree Spurge, Naked Lady, Sticks on Fire, Milk Bush) (see Euphorbia Tirucalli, [[Euphorbia Tirucalli]])
Although may be pruritic, irritant dermatitis is typically has burning or “prickling” pain
Cumulative irritant dermatitis most commonly affects thin exposed skin regions (back of hands, between fingers, face, eyelids): long-term exposure may result in pruritus, folliculitis, calcifications, or acneiform rash
Melanoderma: may occur with creosote or asphalt/tar products
Treatment
Latency to Resolution: typically diminishes spontaneously within 96 hrs
References
Contact urticaria due to the common stinging nettle (Urtica dioica)–histological, ultrastructural and pharmacological studies. Clin Exp Dermatol. 1991 Jan;16(1):1-7
Long-term safety and toxicity of azathioprine in patients with air-borne contact dermatitis. Indian J Dermatol Venereol Leprol. 2001 Mar-Apr;67(2):75-7 [MEDLINE]
Contact allergy to herbal teas derived from Asteraceae plants. Contact Dermatitis. 2006 Apr;54(4):196-201 [MEDLINE]
Compositae dermatitis from airborne parthenolide. Br J Dermatol. 2007 Mar;156(3):510-5
A systematic approach to systemic contact dermatitis and symmetric drug-related intertriginous and flexural exanthema (SDRIFE): a closer look at these conditions and an approach to intertriginous eruptions. Am J Clin Dermatol. 2011 Jun 1;12(3):171-80 [MEDLINE]