Dental sinus infection symptoms

Your sinuses and teeth are closely connected. Several pairs of sinus cavities are located in the bones of the skull near upper teeth roots. Due to this close proximity, dental issues like infections and inflammation can sometimes spread to the sinuses causing a secondary sinus infection.

Sinus infections that originate from oral health problems require different treatment than sinusitis from colds or allergies. Recognizing dental sinus issues quickly leads to faster treatment and relief.

Let’s look at how dental infections can cause sinusitis as well as the key sinus infection symptoms to watch out for.

Dental sinus infection symptoms

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How Dental Problems Cause Sinus Infections

Oral health issues like abscesses, periodontal disease, and impacted wisdom teeth put you at increased risk for bacterial sinus infections.

Here’s how it happens:

1. Infection spreads

Dental issues such as abscesses create a breeding ground for bacteria. These harmful microorganisms can travel through the tooth pulp and find their way into the nearby sinus cavities. Once there, they multiply, triggering sinus infections and related symptoms like congestion and facial pain.

2. Structural issues

Impacted wisdom teeth may press on and obstruct the sinuses leading to leading to congestion and mucus buildup. The obstruction caused by these teeth can impede normal sinus drainage, creating an environment conducive to infections.

3. Inflammation

Severe gum diseases can cause inflammation and swelling in the gums, obstructing the natural drainage pathways of the sinuses. As a result, mucus accumulates, providing a perfect setting for bacteria to thrive, eventually causing sinus infections.

4. Open Cavities

Cavities in cracked or damaged teeth can serve as open channels between the mouth and sinuses. Bacteria easily enter these cavities, making their way to the sinuses and initiating infections. It emphasizes the critical need for prompt dental care to prevent such pathways from forming.

5. Allergies

Dental materials, like metals in amalgam fillings, can cause allergy and inflammation in both mouth and sinuses.

Key Symptoms of a Sinus Infection from a Dental Source

Here are some of the most common signs and symptoms that a sinus infection may be originating from a dental health problem:

  • Green or Yellow Nasal Discharge – Green or yellow nasal discharge often indicates an infection rather than clear allergies.
  • Sinus Pain Worsening When Bending Down – Changes in pressure due to gravity can intensify sinus pain, especially when bending down.
  • Upper Teeth Sensitivity, Pain, or Looseness – Dental infections can cause referred pain to the sinuses.
  • Sinus Symptoms Unresponsive to Medication – When sinus symptoms persist despite medication, it might be an indication that the root cause lies within dental issues.
  • Facial Swelling – A dental abscess can lead to swelling in the sinus regions.
  • Bad Breath or Unpleasant Taste – Sinus discharge can sometimes drain into the mouth, leading to bad breath or an unpleasant taste.
  • Fatigue – Chronic and uncontrolled infections, including those originating from dental problems, can lead to exhaustion.
  • Low-Grade Fever – A low-grade fever might accompany a sinus infection.

Recognizing these symptoms can aid in early diagnosis and appropriate treatment.

Getting Treatment for a Dental Sinus Infection

If you suspect your sinus infection may be caused by an underlying dental issue, see both a dentist and ENT doctor. The dentist will examine teeth and take the necessary X-rays to identify any oral source of infection and develop a dental treatment plan. This may involve antibiotics, dental extraction, root canal therapy, gum disease treatment or removing problematic dental materials.

An ENT doctor can evaluate the extent of sinus involvement, provide medication to manage sinus symptoms, and collaborate with your dentist on the best overall treatment approach. Be sure to get prompt professional help for dental sinus infections to prevent chronic sinus or tooth damage.

Final Note

Sinus infections that originate from dental problems require special diagnosis and coordinated treatment from both dentists and ENTs. Watch for key symptoms like localized sinus pain and bad breath along with ongoing dental issues. Getting dental infections under control quickly can help prevent chronic sinusitis. With the right medical and dental care, you can breathe freely once again.


  • Editorial team

    A team comprising oral health care professionals, researchers, and professional Writers, striving to impart you with the knowledge to improve your oral health, and that of your loved ones. 

  • Lilly

    Lilly, aka, Liza Lee, is a passionate community oral health officer and our lead writer. She's not only well-versed in performing a multitude of dental procedures, including preventive, restorative, and cosmetic, but also an avid writer. Driven by the significant oral health burden all around her, Lilly strives to build capacity and promote oral health. She envisions making a lasting impact by advancing research, prevention, and promotion efforts to alleviate oral health disparities. Please share your views and opinions on my posts.

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