Pain under the chest should first be considered as a possibility of chest wall pain, i.e. pain in the muscles and bones of the chest, which is usually associated with inflammation of the intercostal nerves. Secondly, viral colds can also cause pain in the intercostal chest, and this pain can worsen with coughing and sneezing, and usually clears up on its own. If the pain in the lower chest is accompanied by a lump, consider breast hyperplasia or other lesions of the breast, and it is recommended to go to the hospital for ultrasound or molybdenum target examination. Angina pectoris caused by heart lesions can also lead to pain in the chest.