<s>[INST] Hi.  I am a healthy 38 year old female.  I have pain when I take deep breaths on the left side of my chest under my breast.  The pain goes up my chest through my neck into my left shoulder only when breathing in deep.  It feels like I have air bubbles in my chest.  It is somewhat painful when taking a deep breath.  I have no other symptoms.  This started three nights ago.  It seems to be off and on throughout the day.  I don't notice it at night.  Do you have any suggestions of what this may be? [/INST] Hello dearWarm  welcome to Healthcaremagic.comI have evaluated your query in details  .*  This is in relation with irritation of pleura due to underlying  lung      pathology which  may  be  infection , inflammation  or  else .*  Needs  precise  clinical  evaluation  and  x-ray  chest  also  for  the  final    diagnosis and further  management .Hope this will help you for sure .Wishing you fine recovery .Welcome for any further  guidance .Regards  . </s>