Lupus vulgaris is one of the more common forms of skin tuberculosis and is often associated with infection by Mycobacterium tuberculosis and the patient’s personal hygiene, among other factors. The diagnosis is confirmed by histopathological examination, pure protein derivative test of M. tuberculosis, etc., combined with clinical manifestations. The basic damage is applesauce-like lupus nodules that break down and heal, forming a scar, which can regenerate into new nodules, with the characteristic of destruction and healing on one side. The treatment is anti-tuberculosis medication to relieve the skin symptoms. Isoniazid injection or topical treatment can be applied, and for small patches of common lupus, scraping treatment can be performed with local anesthesia, and the prognosis is generally good.