With regard to internal causes, 30 patients presented with a positive patch test result for metals, but only 2 presented with exacerbations of the lesions after a challenge test. [emedicine.medscape.com]

Further workup ruled out contact dermatitis, polymorphic light eruption, and heat as the culprit, confirming that the reaction was due to true photosensitivity rather than to photoaggravation. [14] Pompholyx caused by UVA exposure may possibly be considered [emedicine.medscape.com]

[…] of dyshidrotic eczema (pompholyx) Treatments for dyshidrotic eczema (pompholyx) are as follows: First-line treatment includes high-strength topical steroids and cold compresses; systemic steroids also used Treatment for bullae (blisters): Compresses [emedicine.medscape.com]

Prognosis of Dyshidrotic Eczema Dyshidrotic eczema follows a chronic, intermittent course, with fewer episodes occurring after middle age. Some mildly affected patients experience spontaneous resolution within 2-3 weeks. [emedicine.medscape.com]

Etiology The hypothesis of sweat gland dysfunction has been refuted because vesicles have not been shown to be associated with sweat ducts. [emedicine.medscape.com]

Dyshidrosis: epidemiology, clinical characteristics, and therapy. Dermatitis. 2006 Dec. 17(4):165-81. [Medline]. Magina S, Barros MA, Ferreira JA, Mesquita-Guimaraes J. [emedicine.medscape.com]