My mom had surgery on 9/22. The surgery included mandibular resection. My mom is experiencing constant jaw and ear pain. How long is this pain supposed to last? Before the surgery her doctor said her leg would hurt more than the jaw. Her leg pain was severe initially but it seems like that pain is subsiding but the jaw and ear pain persists. Anyone experience something similar?

I'm supporting my mom who was diagnosed with scc.
6/4/15- 1st saw dentist with complaints of lesion that wouldn't heal.
8/2/15 after visits to primary and dentist for second opinion, biopsy performed on gums and tongue.
8/4/15 diagnosis of scc of oral cavity (stage 4)
9/22- surgery for resection of portion of jaw, 60% of tongue, floor of mouth, soft palate, pharynx and neck dissection. Reconstruction with leg bone and skin graft from thigh.