Chest muscle pain is not necessarily lung cancer. Tissues in chest such as muscles, ligaments and bones, lesions of these tissues can cause muscle pain sensation. Common causes are: i. Chronic cumulative injuries caused by poor body position, labor posture, carrying heavy objects at work, etc. Chest muscle pain is very likely to occur after encountering physical stimuli such as dampness and cold. Second, all kinds of direct or indirect violence, muscle strains caused by chest muscles, ligaments, soft tissue injuries. Subcutaneous cellulitis, intercostal neuritis, costochondritis in chest area. Rarely, metastasis of chest muscles or ligaments caused by lung cancer. It is recommended to find out the cause before further treatment.