Somewhat of a blind technique because the nerve is in a general area, but varies person to person.

So sometimes you get that jolt in the lip or tongue. Sometimes it causes that paresthesia.

I’ve had a few that I’ve mapped out. It takes takes time, and the timing varies. But the fact that you are feeling tingling is a great sign. Just know that it wasn’t anything the endodontist did wrong. It’s just an inherent risk with the procedure.