Rosacea is a chronic cutaneous disease of the convexities of the central face (cheeks, chin, nose and central forehead) w/ periorbital and perioral skin sparing. This condition is attributed to chronic vasodilation.
Remissions and exacerbations are common.
It typically appears after 30 years of age but may occur at any age.  It commonly affects fair-skinned individuals.
The common presenting symptoms are facial flushing, stinging/burning erythema, telangiectasia, edema, papules, pustules, ocular lesions, and hypertrophy of the sebaceous glands of the nose with fibrosis.
A history of episodic flushing often heralds onset of rosacea.

Differential Diagnosis

  • Skin conditions that have similar features as rosacea include the following: 
    • Acne: With comedones but without ocular symptoms
    • Allergic conjunctivitis: Acute exposure to allergen
    • Photodermatitis: Appearance of rash on multiple body parts when exposed to sunlight
    • Cutaneous sarcoidosis: Red-brown macules and papules commonly involving the face, periorbital areas, nasolabial folds and/or extensor surfaces 
    • Contact dermatitis: Associated with itching and often improves with time once causative agent is removed 
    • Seborrheic dermatitis: Distinct pattern of distribution over the scalp, eyebrows and nasolabial folds
    • Systemic lupus erythematosus: Rarely with pustules
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