Actually, it is Hyperkeratosis of the palm. I have this condition and went to a few dermatologists before coming up with a diagnosis. It is confirmed though, and sadly, you will deal with it for life, and it will worsen. Sometimes it gets better, but it always gets bad again. It starts to become very painful too...
These are known as physical urticarias,pressure induced,or cold leading to swelling of fingers.No specific treatment for this.