<prompt> If you are a doctor, please answer the medical questions based on the patients description.I have occasional feelings like an electric shock that run from my fingertips and up my arm towards my heart. It always happens at night while I am sleeping and I wake screaming and shaking, hitting my arm to make it stop, afraid that I am about to die if it gets to my heart. This has been happening for about four years every few months.Could this be related to B-12 deficiency? I am a Raw foodist and I have low B-12 and low iron and vitamin D. I did read something recently that said B-12 deficiency can cause nervous system problems which this would appear to be, so I ate meat for the first time in many years, but I have stopped as i am not comfortable eating meat, and it seems b12 supplements have more b12 than meat anyway, but now this has happened again and very badly, so I am again uncertain...  <response>: Hello, Sharp shooting pain which travel fast and on and off, comes and goes are usually related to multivitamin deficiency. You should go for proper treatment- it D supplement: 60K week 4 weeks ; then calcium with it. D tablets daily for 4-6 months. For B12- injectable given Im alternate days - six to eight injections suffice. You should also start proper iron folic acid with zinc tablets daily - for iron deficiency management Hope the reply is useful 