Hidden pain in the left side of the chest is a relatively common symptom of chest pain in clinical practice, and the specific treatment and management of this condition depends on the nature of the pain and changes in the condition. For the simple pleurisy or costal neuritis, costal chondritis and other diseases, you can consider appropriate rest, bed rest and avoid prolonged ambulation or exertion, will be able to relieve the symptoms of pain. For the pain is more obvious, frequent attacks can also be considered oral fenbendazole. For elderly patients, it is considered to be due to cardiac causes, such as coronary artery disease, angina pectoris, and even atypical acute coronary syndromes, need to go to the emergency room to carry out the appropriate electrocardiogram and the first level of cardiac enzyme spectrum testing, to rule out the possibility of acute infarction, so as to be able to according to the cause of the specific treatment. The left side of the chest pain, must go to the regular hospital for detailed examination, find a clear cause, and according to the cause of the system standardized treatment.