I've seen an endrocronoligist and a dermotoligist to go along with a nurologist and an internal meds type and none of them have even the remotest idea of what it might be. One of the first things they checked was for some kind of over calcification anywhere in my body. If anything I am actually low on calcuim in my right hip by something like 40%. My cardiologist has done all the sonograms in the world checking my circulation and he says it is fine. I have some of the best he's seen. That's not surprising as I'm a retired Navy SEAL and have always been in very good shape.   My joints all move freely, X-rays show nothing involved in blockiing anything. I can't have an MRI because of metal fragments in my body (from Vietnam) and a computer mounted in my back that is tied into my spinal cord. This non-stretcheness is just in the skin itself.   If you ever find out anything concrete (no pun intended) about what this might be, I sure would appreciate hearing from you.   Froggy