Left chest pain in the lower ribs in view of the following circumstances: first of all, we consider whether it is a soft tissue contusion caused by rib trauma, or intercostal neuralgia, there may be due to the left side of the chest of the lung disease, said pneumonia, lung abscess, tuberculosis, or lung cancer, the lung occupation can also cause the left chest pain in the lower ribs, because the heart is in the left side of the chest between the fourth and fifth ribs, it may be that there are heart problems. For example, angina pectoris, myocardial infarction and other conditions. If the pain lasts for a long time, then we have to do some relevant tests, such as chest X-ray and CT of the lungs, in order to clarify the diagnosis of the disease: intercostal neuralgia or soft tissue injury, or lung disease. You can also do an electrocardiogram and cardiac enzymes to see if it is a heart problem.