<s>[INST] pain like pulled musle on lower rib cage behind right breast. generated from sternum when i was trying to open a stuck jar cover. could i have injured a fibroid??? or is there actual muscle there. hurts to move, cough. tried ibuprophen and tylenol but neither on releived the pain??? [/INST] Respected User, hi I evaluated your query thoroughly.* In our clinic we recommend combination of oral Tramadol HY Chat Doctor. * Should refrain from heavy work, sleeping on that shoulder.* Deep breathing exercises help.* Consult your Consultant Surgeon if not satisfied within 2-3 days of the above treatment to rule out any other underlying pathology in form of ligament tear. Hope this clears your query. Thanks for using Chat Doctor and viewing my answer. Regards. Hope you get well soon from this condition. Bye dear take care. </s>