Vulvar cancer is a malignant tumor of the female reproductive system. When vulvar cancer becomes severe, the lesions metastasize to many areas, which can cause serious clinical symptoms, severely affect the patient's quality of life, and even endanger the patient's life. For example, if vulvar cancer metastasizes to the inguinal lymph nodes, pain can occur in the area of the metastases. Additionally, mobility of the limb on the side of the metastases is limited, and swelling of the lower limb occurs. If the patient's lesions metastasize to the lungs through the hematogenous route, clinically the patient may experience coughing, expectoration, chest tightness, chest pain, and even some patients may have respiratory failure, which severely threatens their life. Some patients have bone metastases, and besides pain in the area of the bone metastases, some patients also experience pathological fractures, limited mobility, and significant pain.