A sinus infection (sinusitis) or inflammation can cause a toothache — specifically in the upper back teeth, which are close to the sinuses. In fact, pain in the upper teeth is quite a common symptom with sinus conditions. If you have a persistent toothache, at first one should consult a Dentist. He or she will consider possible dental causes for a toothache, such as periodontal disease, tooth grinding, cavities or an abscess. If the dentist rules out a dental cause for the tooth ache, in that case, consult your Family Physician. He or she will consider whether a sinus condition or other underlying medical problem is contributing to a toothache. A sinus infection can create pressure and pain in the mouth and cause a sinus tooth pain. Specifically, this is due to pressure and pain in the maxillary sinuses located behind the cheek bones. Sinus tooth pain is often confused with other causes of tooth pain, including gum disease, tooth decay, or an impacted wisdom tooth.


A sinus infection occurs when bacteria from the nose enters the sinuses. To help you assess whether you have a sinus tooth pain or a toothache caused by something else, one should note the symptoms that occur in addition to pain around the upper teeth, eyes, or cheek.

Symptoms of Acute /Chronic Maxillary Sinusitis Include:

  • Fever
  • Stuffy nose and nasal discharge
  • Bad breath
  • Pain that is worse when sitting up than when lying down
  • Tenderness, redness, or swelling in the cheekbones
  • A cough
  • Nasal intonation

Note: One of the most common side effects of sinus infection is that one starts mouth breathing. Mouth breathing makes the mouth dry as such risk of dental health problems increases.