After patients initially diagnosed with early stage breast cancer receive treatment and their disease is under control, 30% of them still develop recurrent metastasis. So, what should we do in the face of recurrent metastasis? How to detect breast cancer recurrence and metastasis as early as possible? After your disease is under control, you should never take it lightly. It is still very necessary to insist on monthly breast self-examination. Be alert when you find the following conditions: 1. Lumps under the armpit or in the breast or adjacent breast do not disappear after your period. 2.A change in the size, shape or height of the breast. 3.A marble-like area under the skin. 4.Changes in the skin of the breast and nipple, including dimples, folds, roughness, redness, heat, and swelling. 5.Blood-like or pus-like fluid flowing from the nipple. 6.In addition, pain, headache, sudden weight loss, and lack of appetite need extra attention, and once they appear, they need to communicate with the doctor promptly. If metastasis is present, what tests and labs may be done? If metastasis is detected, a series of tests are needed, including medical history, physical examination, hematology, liver and kidney function, serum electrolytes, tumor markers, ECG, chest X-ray or CT, abdominal ultrasound or CT, bone scan and ECOG PS score.