How bad does an emg (electromyogram) test hurt?

Tolerable discomfort: The EMG pin is like a fine wire antenna that records from muscle; typically a 28 gauge, a tiny bit larger than an acupuncture pin, but smaller than an injection needle. It feels like an insect bite. Not as bad as a blood draw or flu shot. Typically 2-8 muscles are checked for each tested limb. Nerve conductions studies are usually done alongside, and they feel like an annoying electrical pulse.

Just: Had one myself on thursday for neck pain into right arm. Took 45 minutes and was very tolerable. I would not describe as pain just twitching. The needles are tiny and not painful. Sort of like acupuncture needles. I highly suggest having a physician ( either physiatrist (pm&r) or neurologist preform and interpret the test).