This patient developed sensitivity at 2 and 3 after switching from “Sensodyne” toothpaste to "Deep Cleaning Sensodyne” toothpaste. As we've discussed before some toothpastes are a little too good at cleaning off root surfaces, creating sensitivity. His symptoms were quick flashes of sharp pain that don't linger when drinking anything cold since switching toothpastes.
I recommended he switch back to his original sensitivity toothpaste. Time will tell but this was a very easy way to decrease his sensitivity. Hope this helps - Tom