What is Lupus Vulgaris?

Answer 1

Lupus vulgaris are painful cutaneous tuberculosis skin lesions with nodular appearance, most often on the face around nose and ears. The lesions may ultimately develop into disfiguring skin ulcers if left untreated.[1]

1. http://en.wikipedia.org/wiki/Lupus_vulgaris

Answer 2

the immune system attacks the body's own tissues as though they were foreign substances and no one knows exactly what causes the body to attack its own tissues. A person may be born with a certain genetic makeup that affects how the immune system functions or makes him or her at risk for lupus. A combination of factors can trigger the autoimmune process, some of which may affect one person but not another; Exposure to ultraviolet light, hormonal factors, smoking, certain medications, certain infections, and some chemical exposure