Chest pain can be caused by chest wall diseases, cardiovascular diseases, respiratory diseases, mediastinal diseases, etc. Lumbar pain can be caused by trauma, inflammation, degenerative diseases, congenital diseases and neoplastic diseases. 1. Chest pain (1) Chest wall diseases, such as epidemic myositis, multiple myeloma, subcutaneous cellulitis, acute dermatitis and so on. (2) Cardiovascular diseases: such as hypertrophic cardiomyopathy, aortic stenosis, myocardial infarction and so on. (3) Respiratory diseases: such as hemothorax, pneumothorax, bronchitis, etc. (4) Mediastinal diseases: such as mediastinal tumor, mediastinal emphysema, etc. (5) Others: gout, esophagitis, esophageal hiatal hernia, acute leukemia, etc. 2. Lumbago (1) Trauma: lumbar vertebral fracture and dislocation caused by direct or indirect violence. (2) Inflammation: Infectious inflammation caused by tuberculosis, pyogenic bacteria, etc. or aseptic inflammation of bone and soft tissue caused by cold and dampness, etc. (3) Degenerative lesions: such as excessive activity leading to prolapse of the nucleus pulposus, the nucleus pulposus pressing on the nerves and causing pain. (4) Congenital diseases: such as lumbar sacralization, vertebral deformity, etc. (5) Tumor disease: such as primary or metastatic tumor invasion of lumbar spine. When chest pain or lumbar pain occurs, you should go to the hospital in time to find out the cause and choose the appropriate treatment under the guidance of the doctor.