I haven't been active here lately but I'm glad I read the "trending posts" email and found this thread. I've also had similar problems, even as long ago as ~1980 when I was just 31 years of age. My girlfriend was teaching me how to knit or crochet, and I found that activity caused my hands to cramp and become numb. She found it relaxing, but I found it stressful. I also had this happen when using a chainsaw or string trimmer. In 1983 I was playing volleyball and got a pain in my leg, which eventually became back pain and it was found to be bulging discs and inflamed nerves due to congenital spinal stenosis. The sciatica would get really bad for a while and then subside, so I could go back to playing sports. But by the time I reached 60 in 2009 I had a lot of pain and weakness in my right leg, especially, and I had to cut back on strenuous sports and other physical activity.
Much of that problem was due to severe bone-on-bone arthritis is my right hip, and finally I went for a hip replacement in 2013, which helped a lot, and I was walking comfortably after about a month of rehab. But I still had significant back pain and sciatica. MRIs and X-rays showed that I had spinal stenosis along all of my back, but especially in the cervical and lumbar spine. I found an excellent surgeon, Dr Ira Fedder, who said he could perform surgery, but first I would need the cervical spine fixed. In 2015 I underwent an Anterior Cervical Discectomy and Fusion, which was scary, but it was very successful. For a while I had lost most strength in my right triceps, but after a couple months it was back to normal. In 2016 I went back in for the lumbar spine fusion, and that almost eliminated the lower back pain and sciatica.
Here are my X-rays:
In 2017 I had a total knee replacement, which corrected severe bone-on-bone arthritis is that joint, and that completes my orthopedic surgeries to date. But I have continued to experience numbness and tingling in my legs, arms, and hands, especially when I have been lying in bed for a long time. I have gone to physical therapy from time to time, and it has helped some, but it seems to be getting worse. I've been stepping up my level of strenuous physical activity, cutting and splitting wood, moving rocks, brush trimming, digging, raking, and mowing.
My symptoms seem consistent with Thoracic Outlet Syndrome, and I'll ask my GP when I go in for my annual physical in a few weeks (around my 70th birthday). I'm sure it has a lot to do with my posture and spending too much time sitting at my computer, and maybe I need to look into a better pillow or perhaps a neck brace. Hopefully not this one: