Demodicosis caused by infestation with Demodex folliculorum hominis is a parasitic acariasis disease which may affect nasal skin. Acne rosacea with demodicosis must be distinguished from nasal furunculi which require antiinflammatory, hyposensitizing treatment. If the latter fails, it is acna rosacea with demodicosis that must be suspected. The diagnosis is made by investigation of nasal skin scrapings. If the mites are found, the patient should be referred to dermatologist for specific treatment.