I have numb patches of skin on my leg and on my arm and the feeling hasn't come back in days what should I do?

I have been using burning hot water sometimes on my arms as part of my OCD but I am trying very hard to stop, I did for a while but now I have started back up again, but am now turning on the cold with the hot, sometimes I don't feel like turning it on, and I wash my hands with two kinds of soap which is regular bar and then dish soap, I do this several times a day. Anyway, I also noticed a patch of skin on my leg that is starting to go numb as well and I haven't been using and hot water on it other than warm water in the shower. At first for my arm I thought that it was just because I have been sleeping on it but usually when I loose circulation the feeling returns with a day or two, it has been almost a week and the felling hasn't returned to the top part of my wrist on my arm. Not sure what to do, please help. My friend thinks that it could be caused by a vitamin b deficiency, I do have a diagnosis of b12 deficiency but I don't know if that would have anything to do with it. On the inside of the elbow joint of my arms I have rashes from excessive hand washing and to treat the dry skin I used neosporin could that have affected it i anyway? I also still have a bit of numbness on the inside of my thighs from my chemical burns which were from trying to clean my legs which I now realize was wrong and stopped almost two weeks ago but thous have almost completely healed after I started using neosporin on them as well but are still purple, There is also most of the time dried soap on my legs but not arms from trying to clean my self as part of my ritual. All of these things I have listed because I am wondering if any of them could be the cause the numbness on my arms and top part of ankle. Please answer if you have any information that can help.