I am 26 years old. Some months ago a soft long lump is formed in the palm of my hands, both left and right hand. It's bigger on my right hand and it's about 1 inch long. It doesn't hurt except for some slight cramps that happens very rarely, sometimes I even feel some slight cramp or tension that goes to my forearm (don't know if that's related). I had made X-ray tests and it all seems normal. Is this a tumor or anything I should be too worried about?