What can cause tooth pain if the dentist says nothing is wrong?

Sinusitis: If your sinuses are inflamed, your maxillary teeth may feel achy. If you do not have a cold or allergies and your dentist cannot determine the cause of your sensitivity, please see an endodontist.

Get 2nd opinion: It's hard to answer this question without more information about where the pain is in your mouth: if it's the upper jaw and in the back, it could be sinus related; you might be clenching or grinding your teeth; it could be neck muscles.

See another dentist: Get another opinion. Try an endodontist or oral surgeon.