Left arm down side just up of elbow pain when I keep arm in table and give pressure to it it pains is it a pinched nerve I can feel some burn sensation also and even when I bend down I feel some chest burn at down left side I don't have any shortness of breath and all also. I had done my tmt last month it was normal Echo 3 days ago normal Ecg normal I am even burping and farting also Even pain is down of left armpit What can be the cause pinched nerve ? Is it so Is those test required again Sometimes I feel pain in right armpit also So what can be the cause pinched nerve?