<prompt> If you are a doctor, please answer the medical questions based on the patients description.I am a 22 yr old woman. Starting about a day ago I have had a sharp pain in my left breast area and my left arm would feel numbtingley. If I breath in heavily the sharp pain increases. I used to get this pain randomly through out my life. I havent had it now since about june. I dont really know why this happens. For the pain I have had now it has lasted for 24 hrs it has never lasted this long usually it does a quick sharp pain off and on for 10 mins and then goes away...  <response>: At 22, the chance of heart as a source of symptoms is low. Low is not zero. In particular, the lining outside the heart may cause discomfort and reoccur repeatedly. I will usually review symptoms of reflux burning, sometimes meal related, often lasting longer than 30 minutes or occurring at rest and musculoskeletal pain positional and localized with a finger. From what youve described, the first step that I would recommend to someone in my office is an over the counter anti-inflammatory like ibuprofen. A trial, paying attention to any improvement, even if incomplete, will be important information for your doctor should your symptoms persist. 