<unk>  is typically diagnosed by careful observation and history taking. It is easily recognized (see signs and symptoms, and gallery). Biopsies are sometimes necessary to confirm the diagnosis and differentiate it from other similar appearing lesions.
Lichen simplex chronicus
Dermatitis
Tinea barbae
Eczema vaccinatum
Tinea faciei
Lichen scrofulosorum
Lentigo simplex
Sycosis vulgaris