One of the things that occurred to me as a physician is the possibility of Tim having scoliosis or kyphosis, both are curvatures of the spine. I have a mild scoliosis, and it can be a bear when I skate because my two shoulders do not perfectly align (one is just slightly lower than the other), and part of my trouble with three turns and spins is my tendency to drop one shoulder or the other (most of its a technique issue, but the scoliosis doesn't help). If he has had any shift or problem with his spinal vertebrae, they might be impinging (pushing down on) a nerve or nerves, and this could explain his pain and numbness. I think he may be in for some serious chiropractic and podiatric (foot) therapy. This is just a guess, but I wonder if I might be on to something. I just he is able to recover and get his skating skills back up to snuff.