Breast cancer with nighttime coughing may be due to the development of lung metastases, or it may be due to respiratory infections, for example. Breast cancer can metastasize through blood and lymphatic routes. Some patients with a long history of the disease may have lung metastases, which can lead to nighttime coughing and hemoptysis. A relevant pathologic puncture biopsy is needed to further define whether the breast cancer is a lung metastasis. They may also be affected by pathological changes and have relatively poor health. If you don’t pay attention to keep warm and lower the body immunity, respiratory infections may occur, resulting in symptoms such as coughing and sputum at night. Patients need to improve the relevant examinations, such as blood routine, c-reactive protein, etc., and if necessary, can perform chest x-ray examination or chest CT examination. Therefore, if breast cancer with night cough occurs, it is recommended that the patient go to the hospital, analyze the condition with the chest examination, and then take follow-up treatment measures.