Autosensitization dermatitis

[Guide]

Autosensitization dermatitis when it appears on the face can be indistinguishable from rosacea, hence a rosacea mimic. 

"Autosensitization dermatitis presents with the development of widespread dermatitis or dermatitis distant from a local inflammatory focus, a process referred to as autoeczematization." Wikipedia

"The term autosensitization dermatitis was coined in 1921 by Whitfield to describe reaction patterns ranging from a generalized, erythematous, morbilliform, and urticarial eruption after blunt trauma to a generalized, petechial, papulovesicular dermatitis after the acute irritation of chronic stasis dermatitis."
Chapter 17. Autosensitization Dermatitis, Fitzpatrick's Dermatology in General Medicine, Donald V. Belsito

A case in point is recorded in the Journal of the American Academy of Dermatology  about a 46 year old woman who was initially diagnosed with rosacea and later diagnosed with Autosensitization dermatitis.