Swelling, redness, itching, pustules (pimples) and hair loss are the most common symptoms, but the following may also be in evidence: Papules (reddish swellings on the skin) Hyperpigmentation (darkening of the skin) Epidermal collarettes (circular areas of hair loss with crusting or scaling around their borders) Superficial erosions Draining tracts Pain around the affected areas The diagnosis of b