The most common type of pain that occurs outside the chest is thoracic costochondritis, a sterile inflammation of the cartilage between the sternum and rib cage. This condition usually has very clear local pressure points and, if the local inflammation is more severe, symptoms of redness, swelling, heat and pain such as increased local skin temperature and skin flushing. The pain in this area will appear or worsen during thoracic activities such as deep breathing, coughing, and forceful lifting. If the pain is not related to thoracic activity, it is important to consider the presence of heart disease, such as angina pectoris or myocardial infarction. In addition to localized pain, this condition will be accompanied by chest tightness, palpitations, dizziness, weakness of the limbs, pallor, and cold sweats, etc. It is necessary to go to the hospital immediately to check the electrocardiogram, as well as to draw blood for troponin to confirm the diagnosis.