The National Rosacea Society pulled together a group of experts that agreed on the characteristics of four different subtypes of rosacea:
Specific clinical signs and symptoms define each subtype, but importantly, subtypes can occur simultaneously, and one subtype can progress to a different subtype.
For an overview of rosacea, go here.
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Cite this: William D. James. Fast Five Quiz: Pathogenesis and Presentation of Rosacea - Medscape - Jul 24, 2019.