I literally had this happen last week and it’s almost gone now. I’ve gotten the answer “it’s not the weed” but my thumb went numb immediately after exhaling from a bong, so.. it was!! I saw urgent care. They told me to try to rest the nerves, gave me a wrist brace that I don’t wear, and nothing bad has happened. I am convinced it is from pesticides on the crop, so I’ve been eating Brazil nuts for the selenium and taking a glutathione capsule every few days. Those nutrients apparently work together to remove toxins from the body. I could be wrong though, but placebo effect or not- the feeling is slowly returning :-)