text: why do i have vibrating electric like needles in my left arm? i have had these feelings of needles or vibrating nerve like endings from my elbow up to the left shoulder and neck and head (left side only).  i'm taking increased meds for trigeminal neuralgia but that hasn't touched it.  i can't remember stretching or falling within the month period that this has been happening.  i saw an "md" who suggested an "up" dose of my neurontin but nothing has stopped the vibration like ache. anyone have anything like this ? it could be a prob with one of the nerves in your arm, the ulnar or median. see your dr for emg testing.