Signs of breast cancer recurrence and metastasis are as follows: 1. Lung metastasis: manifested as cough and stuffiness; 2. Liver metastasis: manifested as loss of appetite and abdominal distension. If the above symptoms appear, the disease has already entered the advanced stage; therefore, breast cancer patients are recommended to have regular review after surgery. The purpose is to detect recurrence and metastasis at an early stage and to treat them at an early stage.