Hi , I have a swollen lymph node under the armpit. It s been there for past few months with no pain or redness , and there have been other lymph node swellings on and off around the arm area and in the groin which have been painful at times . Do I need to be concerned ? I have also been having severe back pain , severe fatigue , nerve tingling , stomach upsets and general malaise past few months . I was suggested to get a needle aspiration test done . Is that enough to determine the cause ? Is a proper biopsy and removal of the node needed ? Thanks .