acne occurs in younger patients and is characterized by comedones. It does not feature erythema, telangiectasia or flushing (1)
light sensitivity and contact dermatitis develop more quickly and lack pustules " chronic discoid lupus erythematosus has discrete scaly lesions. The rash of systemic lupus erythematosus is more rapid in onset
acne rosacea
perioral dermatitis patients have micropustules and microvesicles around the mouth or eyes and dry, sensitive skin may result from the inappropriate use of topical corticosteroids (2)
seborrhoeic dermatitis may sometimes accompany rosacea and contribute to facial erythema, but a prominence of yellowish scaling around the eyebrows and alae nasi, together with troublesome dandruff helps in differentiating it from rosacea (2)
atypical or nodular rhinophyma needs to be differentiated from lupus pernio (sarcoidosis of the nose); basal cell, squamous cell, and sebaceous carcinomas; angiosarcoma; and nasal lymphoma. Sometimes a biopsy maybe required for the diagnosis (2)
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