Tumor metastasis to the leg is likely to appear bone metastasis, and its symptoms can be divided into local symptoms of lower limbs and systemic symptoms of advanced tumor. 1. Local symptoms of lower limbs: manifested as local pain, swelling, abnormal joint movement, etc., and pathological fracture may occur. 2. Systemic symptoms of advanced tumor (1) General symptoms: severe pain in the primary tumor site or the whole body, rapid weight loss, emaciation, mental depression, severe anemia, abnormal coagulation function, skin bruises, etc. (2) Different types of tumor patients will show their own symptoms. For example, in the late stage of liver cancer, there may be yellowing of skin all over the body, swollen abdomen, ascites, vomiting blood, varicose veins of abdominal wall, etc.; in the late stage of lung cancer, there may be coughing, hemoptysis, respiratory difficulties, etc. It is recommended to go to hospital for treatment in time to avoid delaying the condition when the above symptoms appear.