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Nerve Conduction Test Side Effect?
I had a nerve conduction test done yesterday which was just on my right & left arms - elbow to fingers seemed to be the focus.  

When my right hand was being tested it was resting on my right thigh.  But when he started on my left hand I turn sideways so that it wasn't resting on that leg and so that the person doing the test wouldn't be so close.

I was awakened early this morning with what seemed like a real bad cramp in my right thigh, where my hand had been resting during the test.   That pain has been severe on an off all day and has made it difficult getting around.  

My question - has anyone else experience problems after this test?  

I heard there were no side effects.   But I have may have experienced 3.

1- both my arms where the muscles where tested are sore (I sort of expected that) and

2- the pain in my leg right where my hand was resting (and I rarely have cramps in my legs).  

3- And I almost passed out when the second arm was being tested - I'm not at all sure about that one.  I am not subject to fainting, and had no problems with the first arm on my lab, but the second arm off to the side he had to stop testing while the got me back to full consciousness.
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I had two nerve conductions tests performed on my left arm and I can tell you that my arms cramped severely after the testing. The neuro told me that it's to be expected because the nerves are stimulated for the testing. It causes the muscles to react to that stimulation. He said that I could take Ibuprofen three times per day, every 8 hours if it was 800 mg dose.
As for your almost passing out, sometimes when your body is subjected to a great deal of pain (these tests are extremely painful) your body reacts by passing out...I learned from my doctors that its a self defense mechanism. You can chill when your pain is severe also. If you've ever watched someone in labor, they chatter their teeth from the intense pain. Some think that it's nerves that one is reacting to but it's more often than not from the intense pains of laboring.
When I had my testing the nurse had me rest my arm on the table. With the electrical current being sent through your arm during testing, I have to wonder if some of it passed through to your leg since your arm was resting on it. I have to think that it's plausible because it's so strong.
I use a tens unit and on higher settings I can feel the same as I did during that nerve conduction test. I actually can't tolerate the higher settings of it on my neck because my neck is being pulled in opposite directions with the stimulation. I have it on a burst setting at the moment and so my head is making slight jerky movements also but I know that it's doing it's job as it reacts this way.
I witnessed a girl in for some rehab on her leg and I thought she was keeping time to the music but it was an HWave machine making her muscles contract in her leg and foot. These machines work much the same as the nerve conduction. You might want to ask your doctor tomorrow if this pain in your leg persists. My guess its from the nerve conduction testing since your arm was resting on it.
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thanks for the info - nice to hear some rationale behind it.  
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I'm looking for anyone who had a severe reaction to the test and you have.  What happened to me was on my left leg.  When he finished, I began going into a seizure, my entire body began jerking and I was screaming at him to stop whatever he was doing to cause this.  He just looked at me out of the corner of his eye but didn't say anything. After about one and half minutes, I began to calm down.  The only thing he told me was that he had touched a bad nerve!  He took me up to head nurse and told her that I have a severe pinched nerve in my back and that I REALLY am in a lot of pain!!! Idiot, I told him I was!
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I just had a nerve conduction study on my legs and lumbar spine. I have severe stenosis. I have a high threshold for pain having suffered from this for over 20 years, with early onset. This test was EXTREMELY painful. The doctor offered to stop because I was crying and screamed a couple times. since we were almost done I bit the bullet and finished. My problems started about 2 hours later. I had severe muscle pain and cramping, and the next morning I had to crawl to the bathroom. Have been in bed all day. It feels like someone lit every nerve in my body on fire. I am taking nerve pain medication, muscle relaxants, and codeine. I should be quite comfortable but I am not. I am also experiencing muscle weakness.
FYI I swim everyday, so this is seriously not normal. Of course can't reach the doctor. Also, I see other people have had these kind of reactions, why are doctors not acknowledging?
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I found this post when I was looking for an answer to this very question, after waking up around 3am with a foot and leg cramp (right side) following a nerve conduction test the previous day (the test was only on my hands which were not touching any other part of my body).  My whole body felt sore. I went back to sleep and arose at my normal hour. My right shoulder/neck felt like it had been hit with a baseball bat...very stiff and sore. Right hand and forearm was also very sore and painful.  I had no such symptoms before the test. In fact, I was feeling remarkably pain-free except for some pain and stiffness in my hands.  My right hand was deemed "moderate" nerve damage and the left was "mild to moderate."  The median nerve runs the length of the arm through the carpal tunnel so it makes sense to me that I would experience shoulder and neck pain after the nerve had been stimulated by the test.  The leg pain seems strange, although I have had chronic issues off and on with my right side...neck/shoulder pain, leg pain (mid-thigh, large muscle), right hand/wrist.  I'm sure it is all connected somehow but I am not an expert on anatomy.  It was good to know that I am not alone, however, I was not warned at all that there would be any side effects.  I feel bad for people who had much worse side effects (crawling to the bathroom).  Since my nerve conduction study was only on my hands and only moderately painful I can just imagine the impact of a nerve conduction study that was either more intense (voltage?) and/or on a larger muscle group.  I find the crawling part completely believable based on my limited experience.  I feel like I've been in a fender bender where I got hit with "moderate" force (20-30 mph)...just enough time to see it coming, tense, and really feel it the next day.
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Hi, I just had a nerve conduction study on Labor Day September 7th, 2015 and ever since I have had severe vertigo to the point I can hardly stand and walk. The afternoon after the test I felt fine but woke up to go to the bathroom in the middle of the night and could hardly walk to go to the bathroom. I went to the urgent care and they treated me for a sinus infection and gave me promethazine to keep me from vomiting and an antibiotic. Slept really good last night but am still having the severe vertigo. I don't know if it was a result of the nerve conduction test or not but I have never had vertigo before. I do have some pinched nerves in my neck and back and I also had a tear in the myelin sheath of my spine. I have no idea but I think the test might have aggravated sort of short circuited my back and caused this. I have no idea but I wish the vertigo would stop. It is definitely debilitating. I can hardly walk let alone eat or do my daily day to day things.
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I just had a NCV/EMG. I had the test done on both arms and my left leg due to sciatica.  Within minutes after the tech started the test, I started having what felt like Menstrual Cramps. I also think I went into a kind of shock or just my body's defense mode as I did not pass out however I almost felt "high".  I was pretty chill, though still in much pain due to the cramps and a few of the pokes.  Later I found I was spotting so it seemed to have cause me to have some menstrual bleeding as well as the cramps.  I don't have those "times of the month" due to the type of birth control I use so I know it's not just a coincidence.  The tech said the cramps can be normal from the test and also from me having anxiety.  After the test I went back to work and started noticing I was getting a gradually worse headache/migraine.  It was my whole head.  I couldn't talk very loud and was very lathargic and still am.  It is now 8:50pm and I started the test at 1:00pm today.  I really hope I don't wake up to pain like I see some people have experienced.  Also, I was and still am, just very out of it hence me saying I've been lathargic.  I couldn't answer questions correctly at work and looked like I had no idea what I was talking about...on top of the headache from Hell! If anymore symptoms arise, I will update. Glad to know I'm not alone.
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Anthony commented 24/11
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I also am having problems after nerve conduction tests on my hands about 3 weeks ago . The tester bloke looked and sounded worried while testing my right hand , he had to turn the machine right up to get a reaction and then changed to my left hand , my left hand is not as bad as the right . He then did the right one again and asked me if I had ever injured the right hand badly in an accident , which I haven't .
I know he turned it up a lot because  the pain in my wrist during the test went from ok to extreme . After the test I asked him whats wrong and he made out all was ok ..********.......I am still waiting for results .
Since the test I have nearly passed out 4 times when standing up after lying down . The first time was about 2 hours after the tests . Also now I have the shakes in both hands . If I rest my right elbow on my knee or a table , my right hand starts to shake and tremble.....heaps . I feel sick everyday and I am also very tied and sleepy .
My tests were done in Brisbane , where were you guys tested .
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