<s>[INST] Hi, I just want to ask regarding on my problem. When I make a deep inhale, I can feel something is aching near on my liver . Its on upper right and upper left part of my belly about 2 inch below my nipples. It just started 2 days ago. I don t feel anything if I will breath normally. I can feel it if I make a deep breath. Is something wrong on my liver or just a muscle pulled right behind my ribcage? [/INST] Hello! Thank you for the query. Strained muscle theory is possible. But your pain can be caused by some other reasons like broken rib, lung disorders or gall stones. It is advisable for you to have at least the chest X-ray and ribs X-ray, abdominal ultrasound.  Fool blood work with liver and pancreas enzymes should be performed as well. Always when chest pain appears, heart condition should be checked with ECG. If this tests will all came negative, strained muscle can be the reason of your pain.  Hope this will help. Regards </s>