For female patients, if there is pain on the left side of the chest: 1, to consider breast problems, such as lobular hyperplasia, acute mastitis, breast tumor occupancy, there will be symptoms of pain on the left side of the chest. 2, if there has been trauma, to consider sternal fractures, around rib fractures, soft tissue contusions, sprains, strains, etc. 3, for cardiogenic diseases, such as previous coronary heart disease, unstable For common diseases of the respiratory system, pneumothorax, massive pneumonia, infection of the respiratory system, pleural effusion, pleurisy caused by various factors, there will also be pain on the left side of the chest. 5. For diseases of the chest wall, such as intercostal nerve pain, herpes zoster pain, will also make women have pain on the left side of the chest.