### instruction:
If you are a doctor, please answer the medical questions based on the patient's description.

### input:
After dental injection of lidocaine into the lower mandible, and very far towards the rear of the mouth (in fact it was to numb for an extraction of the left lower molar next to bicuspid, and I questioned "Why so far back?" to the student performing the injection [unsupervised, I might add].  I thought that healing processs was not right, developed severe (and I do not use thi word lightly) pain starting in lower left mandible, but much more intense (like someome were stabbing me with a knife in my left temple and left eye...I pride myself on not crying from pain, yet this pain, at 51yrs of age has me sobbing and in a fetal position, what is so terribly wrong?

### output:

Thanks for sharing your concern in Chat Doctor forum. In the first part, the student, as you said, is not wrong in giving lidocaine injection at rear part of the jaw. The nerve that supplies all the teeth of lower jaw enters into the mandible through a hole from that area. It is called nerve block to anesthetize the whole side of the jaw. If the injection is given just beside the tooth it will not penetrate the thickness of the jaw bone to reach to the nerve for the particular tooth and that does not numb your tooth. It is generally done in child patients till 6 to 7 years of age when the jaw bone is much thinner. In the second part your suffering from pain is little unusual. Post extraction pain is generally not so severe. There are commonly three reason of sever pain after extraction of tooth. Firstly there could be laceration or fracture of the tooth supporting bony part of the jaw, Secondly the area could be severely infected, and lastly it turned to so called Chat Doctor.  You should visit to your dentist as early as possible for diagnosis and get proper treatment. And nothing of these are terribly wrong in their occurrences. Any such pain can be controlled by using analgesics. Until you visit your doctor you can start Diclofenac 100 mg two times a day. Take this 