The nerve conduction velocity test is not painful, although depending on the strength of the electrical impulse, patients may experience discomfort as they would with an electric shock, according to MedlinePlus. When the nerve conduction velocity test is complete, patients should not feel any pain.
Physicians perform this test to determine whether nerves have been destroyed or damaged or to evaluate nerve or muscle disorders, such as myasthenia gravis, myopathy and Lambert-Eaton syndrome, explains MedlinePlus. Physicians frequently administer electromyographies after nerve conduction velocity testing. During an electromyography, a physician places needles into a patient's muscle, and the patient must contract the muscle. The process can cause discomfort, and after the test, the patient may experience sore muscles where the physician inserted the needles.