The Pressure Begins
You will be feeling pressure as soon as the extraction begins. Although the shot before is supposed to numb the pain, it won’t take away the feeling of the pressure. The reason for this is that the lidocaine inhibits the nerve fibers around the affected tooth from transmitting pain sensations, however the said local anesthetic doesn’t affect the pressure sensations. So relax, it’s normal.
Where does the pressure come from? It comes from the dentist trying to expand the socket of the affected tooth. Imagine pulling a large screw from a wooden table using your fingers. Since you don’t have a screwdriver, you loosen it by forcing it against one side and the other until the hole widens enough for you to pull it out.