The needle EMG study involves the insertion of needle electrode into the skin. The electrode is moved around slightly after its insertion. The needle electrodes are designed for minimal pain and discomfort.
The EMG electrodes record the electrical signal generated by the muscle. If there is muscles disease or nerve damage, the EMG electrode will show the abnormality.
There is some discomfort at the time the needle electrodes are inserted. They feel like shots. After study done, the muscle may feel a little sore for up to a few days.