<s>[INST] Hi, may I answer your health queries right now ?  Please type your query here...Hi, i am a 28 y/o female and suffer from sharp pains in the heart and collarbone on a regular basis which intensifies when i breath in. What could this be? It is almost like a very bad stitch but is not brought on by physical activity. [/INST] Hello dear , hiWelcome to Healthcaremagic.comI have gone through your query thoroughly .*  This is in relation with chest wall condition involving intercostal muscle or    ligaments most likely .*  Must get primary x-ray of the chest and later on MRI  according  to the    clinician  concern .Hope this will help you .Wishing you fine health ahead .Regards dear take care . </s>