In the early stage of breast cancer recurrence and metastasis, patients often do not have any symptoms, but regular hospital checkups can detect early signs of metastasis. The probability of recurrence and metastasis will gradually decrease with the prolongation of the postoperative period, but there are many patients who have recurrence and metastasis more than 10 or even 20 years after surgery. After five years, the follow-up should be once a year for life. The follow-up examinations include clinical examination, ultrasound and X-ray examination of metastasis-prone organs and sites, as well as skeletal nuclear scan, CT and magnetic resonance imaging (MRI) examination, if necessary. Another important part of follow-up is to check the contralateral breast, because the risk of primary breast cancer in the contralateral breast will increase 3 to 4 times after breast cancer in one side. Forms of breast cancer recurrence and metastasis: Lung metastasis: Most patients with lung metastasis lack typical symptoms, only 1/3 of them may have cough, hemoptysis, chest pain and shortness of breath. Chest X-ray is the simplest and easiest method, and breast cancer patients should be examined once every six months to a year. Chest CT and MRI can also detect smaller lesions, but are not routinely used. For patients with isolated lesions or lesions limited to one lung or one lobe and no clear metastases in other parts of the body, surgical resection can be performed and some patients can still survive for a long time after surgery. Bone metastases: Bone metastases are mostly located in the vertebrae, pelvis and femur. The main symptom is gradually increasing, well-localized pain, and localized pressure pain but often no palpable mass. In some cases, nerve compression or pathological fractures may occur. Bone destruction can be detected 3 to 6 months earlier with whole-body nuclide bone imaging than with X-rays, so this method can diagnose bone metastases early and buy time for early treatment and pain relief. After the diagnosis of bone metastasis, the treatment mainly includes bisphosphonate drugs to reduce bone destruction, local radiation therapy and systemic anti-cancer and analgesic treatment. Liver metastasis: early stage of liver metastasis is often asymptomatic, but when symptoms such as wasting, loss of appetite, liver distension, weakness, low fever and jaundice appear, they are mostly advanced. Therefore, if clinical follow-up pays attention to liver examination, relatively early liver metastases can often be detected, and about 10% of patients with liver metastases can be surgically removed. Soft sis recurrent metastases: mainly include local recurrence in the chest wall, ipsilateral axillary (residual) and supraclavicular lymph nodes as well as contralateral breast, axillary and supraclavicular lymph node metastases. There are also internal breast lymph nodes adjacent to the sternum and mediastinal lymph node metastases. Superficial metastases can be detected by clinical palpation, while deep lymph nodes need to be detected by ultrasound or CT or MRI. For limited recurrent metastases, some patients may be cured by reoperation or local radiotherapy. How to avoid breast cancer recurrence and metastasis? 1. Avoid factors that promote breast cancer recurrence. Patients of childbearing age should avoid pregnancy and breastfeeding for a long time after surgery; maintain a scientific and civilized lifestyle, do not smoke, limit alcohol intake, avoid using cosmetic products with high estrogen content, and minimize the exposure to radioactive and electromagnetic radiation. 2. Insist on self-examination and regular re-examination. Self-examination is an effective means to detect breast cancer recurrence and metastasis at an early stage, and you should frequently and carefully observe whether there are any abnormal changes in the chest wall, whether there are papule-like changes, and pay attention to the surface color and texture. If you find any abnormalities, you should immediately consult a specialist to confirm the diagnosis and treatment. In order to prevent recurrence, you should also go to the hospital for regular review, generally every three months within two years after surgery, every six months afterwards, and once a year after five years. 3, actively participate in physical exercise, maintain an optimistic mood and a good state of mind, develop a scientific diet, eat less high-fat, smoked and barbecued food, eat more fresh vegetables, fruits, soy products, dairy products, fish, etc.. Various mushrooms such as shiitake mushroom, poria, black fungus and monkey head mushroom are natural bio-regulators that can enhance the immunity of the body and have certain anti-cancer effects.