All acneiform eruptions are not acne vulgaris. Some acneiform eruptions can be caused by fungal organisms that are usually not resolved with standard acne medications. Demodex is a skin mite, taking advantage of local and general factors to proliferate. They are ubiquitous in the skin but there is a predilection for the face. The diagnosis of demodicosis is based on a range of clinical, parasitological and therapeutic arguments. Screening for Demodex sp is essential to establish the correct diagnosis and ensure suitable treatment.