I am a 46 year old woman and I have been experiencing itch palms and soles of my feet for 4 months. I had a Glucose Tolerance test and a full lab work up. The only thing it shows was I was at the low end of normal on my B12. Since I started taking Mythelcobalamine about a week ago, the itching seems to be worse. Do you think it is an allergy? I have not rash anywhere, it is all under the skin.