I occasionally will get tingling or itching in the arms and rarely slight numbness in a leg.

The first time this happened, I made the typical internet self-diagnosis of MS, ALS, or brain cancer (or all of the above.) My Dr. didn't seem convinced, but I went ahead and got a brain MRI, which of course, showed nothing wrong.

This was some years ago (7+?) and since then I am surprised how many seemingly healthy people I have encountered suffer from numbness/tingling when having some emotional/psychological issue.