Lupus vulgaris is a chronic skin disease that is caused by a bacterial infection of the skin. It is characterized by the formation of tissue nodules, which become inflamed and eventually ulcerate. Synonyms for lupus vulgaris include tuberculosis luposa, tuberculosis cutis, and tuberculosis verrucosa cutis. The use of the term "tuberculosis" in the synonyms for lupus vulgaris is due to the fact that it is caused by the same bacterium that causes tuberculosis. However, lupus vulgaris differs from tuberculosis in that it affects only the skin and not the lungs. Early diagnosis and treatment are important to prevent the spread of the infection and the development of complications.