Hi, welcome to our site. I am Dr Saumya Mittal, MD. Read your query. That is a very significant question and i appreciate your problem. I will try my best to answer your query There are a number of possibilities. I will discuss them investigation wise- 1. chest x ray- doing this test may help us know if there is any possibility of pleural effusion with possible pneumonia. there may also be chances of pleuritis. The involvement of a local area may cause the chest pain, backache, and both would increase on taking a deep breath. There is also a possibility of a rib fracture in case there is a history of trauma to the chest. This presents as backache that increases on deep breathing and laughing. This may radiate forwards to the chest 2. Ecg- it is always important to rule out cardiac issues in a person with chest pain. Now I agree that the chest pain of cardiac origin is usually left sided, but atypical presentations are frequent. So getting an ekg, and echocardiofraphy if necessary, is always a good idea. 3. x ray cervical spine- ap/lateral= cervical radiculopathy- this usually affects the arms. But the pain in chest and back may also be involved. This is however not usually related to breathing and so I have put this possibility late. I hope this helps you. Inform the reports mentioned above/if any other so I can be of help further. I have given you the answer to the maximum considering the information provided. The results of the tests could further enhance my answer to you. Please do understand that some details could be extracted from a detailed history and examination. Please feel free to ask another query. I would be glad to help you. Looking forward to your return query with the details asked so that I can help you further. (If the answer has helped you, please indicate this) Best of luck. Dr Mittal. MBBS, MD (Internal Medicine), CC (Diabetes Mellitus), DNB (Neurology) Consultant Physician and Diabetologist JS Hospital Ex Apollo Hospital, Delhi Ex Kailash Hospital, Noida