Extensor Mechanism Finger Cadaver Dissection

[@CutiePie232]

Doctor please help me... I'm female 24 years old 147 lbs 5.6 feet.. I went to take ncv test because only 1 of my hands was having burning sensations when used alot... So i did NCV test on both hands, one was fine before test but after the test it got bad and it started burning me that very same night and i feel my fingertips getting numb and heavy. , they used 50 mili amps on me with pulse width 100 and it wasn't gradual... and it was so painful and my hand jumped alot.. Is there a chance ncv tests are harmful?