Thanks for your question on Healthcare Magic. I can understand your concern. In my opinion, we should first rule out heart diseases for your left sided chest pain. So get done ecg, 2d echo and stress test (trade mill test). If all these are normal then no need to worry for heart diseases. Sometimes costochondritis (Inflammed rib cartilage - sac) can be the cause. So apply warm water pad on affected areas of chest. Take simple painkiller and anti inflammatory drugs like ibuprofen or acetaminophen. Avoid movements causing pain. Avoid heavyweight lifting and strenuous exercise. Don t worry, you will be alright with all these. Hope I have solved your query. I will be happy to help you further. Wish you good health. Thanks.