<s>[INST] Hi, I think that I may be suffering from pleurisy. My left side is below my rib cage and extending into my back is is alot of pain. It doesnt necessarily hurt bad when I take a deep breath though....I had this about 10 years ago and it affected my spleen then. Does this sound right? I went to the ER last night around midnight and they gave me a shot for pain...it did not help. They also gave me two zithromax pills and an Rx for a Z-pak....I feel just as bad today.... [/INST] Hello dear, thanks for your question on Chat Doctor. I can understand your situation and problem. As a rule in left sided chest pain, we need to rule out cardiac cause first. So get done ECG and 2d echo. If both are normal then no need to worry much for cardiac cause. Pleurisy (inflammation of pleura) can be the cause. So get done chest x-ray to rule out possible causes for pleurisy (pneumonia, tuberculosis, pleural effusion etc.). If chest x-ray is also normal then no need to worry. You might be having simple muscular pain. So take painkiller and muscle relaxant. Apply warm water pad on affected site. Don't worry, you will be alright. </s>