Rosacea is primarily diagnosed clinically based on the 2017 global ROSacea COnsensus (ROSCO) panel criteria, requiring one diagnostic criterion or two major criteria:
- Diagnostic Criteria: Persistent centrofacial erythema, phymatous changes
- Major Criteria: Flushing, inflammatory papules and pustules, telangiectasia, ocular rosacea
- Minor Features: Burning, stinging, edema, dry skin sensation
In cases of diagnostic uncertainty, a skin biopsy may be considered. Differential diagnoses include acne vulgaris, dermatitis, lupus, and others.
