I had a root canal and a crown 10 years ago on tooth # 3. About a year ago it started hurting really badly. The dentist was sure the pain was coming from tooth #2 so he did a root canal. The pain was still there. He then decided to do a retreatment on tooth #3. The pain was still there. He then decided to have #3 pulled and the pain is still there. It is so painful and they have done x rays and found no infections, nothing. where is this pain coming from? I'm so frustrated and can't live in this pain forever. It feels like it hurts in the bone.It is intermittent but mostly hurts every day.It is not a cold or heat sensitivity. It is pain. I can't keep paying for this dentist's guess work. Please give me some suggestions as to what could be possibly causing this pain. Thank you so much.