I have extreme pain in tooth weeks after a filling. is this normal?

Absolutely not!: You need to return to your dentist so that the condition of the tooth can be re-assessed. Severe pain after a filling suggests the onset of pulpitis, and your dentist may determine that root canal therapy is needed to eliminate pulp infection so that the tooth can be allowed to remain.

See your dentist: See your dentist as soon as possible. You may simply need a bite adjustment or the nerve may be dying for which you may need a root canal procedure. Your dentist can determine exactly what is wrong.

May need root canal: This could be caused by a couple of things. The filling could be too "high" meaning you are hitting on it hard and before other teeth. This can be very painful. Another cause could be the cavity was so deep that now the pulp is irritated. This is common and not the dentists fault, he had to get out all the decay, and now the pulp is reacting. This tooth may need a root canal. See the dentist.

No: "extreme pain" should not be occurring. Sensitivity to cold can occur for a short period following a filling. If your "pain" is spontaneous, wakes you at night, or lingers for more than a few seconds, your tooth may need a root canal, which is possible after deep fillings. If your pain is to chewing, you might just require a simple bite adjustment on the new filling.

Pain: You should see your dentist as soon as possible to evaluate the tooth. You may need the bite adjusted, or a root canal. He may also put you on a antibiotic.