I have been having persistent numbness all over the body for almost two years, including occassional pain & teeth sensitivity. done mri of brain & spine and blood tests but all normal. it's worse in the mornings. what could it possibly be?

Have you been evaluated for MS (multiple sclerosis) - you have a neuropathic central pain state.

Numbness over entire body can be seen with "small fiber neuropathies" and these can be challenging to diagnose. A neurologist might want to do an EMG test first, but a skin punch biopsy procedure may reveal the true answer. Address this category with your physicians.

In addition to Dr. M's excellent advice, consider adding a nutritionist to your health care team. He/she can guide you in foods and supplements that can support your nervous system, especially the peripheral nervous system. Be sure to coordinate this w/your doctor. Peace and good health.