An EMG test should not be very painful. If patients feel pain during testing, they should inform their examiners, Johns Hopkins Medical suggests. At times, pain distorts test results.
The type of sensation felt during an EMG test depends upon the format used. If electrodes are placed on the skin, the patient feels a twinge or spasm from electrical current, Mayo Clinic states. During needle EMGs, patients sometimes feel pain when needles are inserted, according to Johns Hopkins Medical.
Patients who are worried about the amount of pain involved should discuss this with their neurologist prior to the procedure, recommends Mayo Clinic. It is sometimes possible to take breaks during testing.