Basal cell carcinoma is not benign, it is a malignant skin tumor characterized by basal cell-like proliferation, also known as basal cell epithelioma, which is less malignant and generally has a better prognosis for patients. The lesions are mainly located on the head and trunk, with clinical manifestations of papular or nodular changes, which may have vesicles or ulcers, and the tumor grows slowly. Basal cell carcinoma is usually treated by surgical excision, and can recur after surgery, but rarely metastasize. Tumors with local invasiveness and deep invasion can cause death, especially in the head and face, where cancerous tissues can extend to bones and bone crevices and eventually penetrate the skull. In a few cases, cancerous tissues extensively invade nerves and extend to the central nervous system, resulting in patient death. Recurrence is common in the nasal and nasolabial folds as well as the infiltrative, sclerotic, and micronodular types, which may be related to the difficulty in achieving negative margins and the underestimation of surgical margins. Patients are advised to detect and treat the disease early to avoid delays.