I am an 18 year old female. I have a problem with my fingers. They keep hurting, even if I hold my phone for just fifteen minutes. At the beginning, it was just a prick that came a few times per day. Now, I feel my fingers burning and itching, to the extent, I have to stop whatever I am doing. One year ago, in a hospital, they told me I had a slight lack of calcium and honestly I do not drink a lot of milk or eat cheese. Is it the cause?