Conversation: The conversation between human and AI assistant.
[|Human|] I have the sensation that I have pieces of glass in my skin. Nothing comes out and the sensation is there for a while (weeks) and then it goes away. It use to be on the bottom of my feet and at the top of my head. Now it is on the top of my foot, along the underneath side of my left arm between my wrist and elbow, and all over my head. When I lay down to sleep or rest my head against a piece of furniture it really hurts. The same is true when I put on socks or clothing over the affected areas. I have been checked for MS in the past but the doctors didn t see enough symptoms. These symptoms have developed since that time. When I was checked, they did not do a spinal tap, we just answered questions and I had an MRI, which showed a non-specific lesion in the brain. Other symptoms were pain on the right side of my body, memory issues, speech issues, overall pain, fatigue, etc.
[|AI|]  Quite a lot of possibilities. First, there is the possibility of having glass in there. But generally something would be visible. Sick nerves in localized areas can occur from nerve poisons. It is more typically at the ends of nerves and on both sides evenly, BUT B12 deficiency, thyroid level low, or Lyme disease or syphilis or some metal poisonings can do this. Cannot say which is in your case and sometimes a biopsy is needed. MS typically goes for years prior to diagnosis.