I'm 21 female. Weight 65.7 kgs height 165 cm approx. Sometimes I have pain in chest muscles and rib. I have done ekg several times and echocardiography once. The report came normal each time. I tend to have upper middle back pain slightly on left side. And left arm pain. I don't experience palpitations or pressure in heart, fatigue or cold sweats my heart rate is normally 80-95 bpm. But i'm concerned about my left arm pain and back pain. These pain eventually goes with hot compress but comes back. I have done usg last month report came normal. I take eltroxin 25 every morning.