Your dentures may hurt while biting for a number of reasons. They may need adjusting to relieve discomfort, or if you have had them for many years, they may not fit as well and may need a relining to tighten them up. Once they fit better they should not hurt while biting. You need to see a dentist that works with dentures. Not all dentists do denture work.
Francis C. Mecadon, DMD
Dana Truesdale, DDS