Ok, first, I'm here because my tongue is numb too after having mercury fillings removed, and was trying to figure out what was happening. I'm amazed at the anger of some people, some of whom haven't even spoken to their dentist. First, it is impossible to know where the nerves are when injecting unless you have opened the person's jaw with oral surgery and located them visually. Second, this is NOT malpractice; it is a normal complication of injecting the novocaine (or any other injection). It happens in a small, small percentage of times (as evidenced by some people saying they've had fillings done for 20 years and never had this happen...). I am not a dentist, and cannot speak to some of the more severe things, but people need to realize that both in medicine and dentistry HUMANS are providing the services, and things do happen, but that doesn't mean it is negligence or malpractice. It is sad to read that some of you have had less than satisfactory conversations with your dentist or their staff, but anytime a nerve is damaged it must re-grow, and the growth is slow. I hit a windshield in 1972, had 41 stitches in my face, and my forehead was numb for almost 10 years. This is an extreme example because the nerves were completely cut, in most of these dentistry situations they are not. If you do not get an answer from your dentist, go see another one or talk to one and explain your symptoms. It is quite possible in some cases it may take up to 2 years. Am I thrilled I have ½ a numb tongue? NO Would I take action against my dentist? Absolutely not. The other thing to think about here is they were fixing a cavity or removing a wisdom tooth - and if left un-corrected, you would end up with a much worse problem. Some procedures do not end up perfectly, and we all just have to deal with the results. If you are having actual pain, I would definitely see your dentist or another one and if they cannot help, go see a pain management physician. They might be able to help. Numbness one can live with, but worse symptoms should be followed up by professionals.