Dental Sinusitis – When Toothache and Sinus Pain Are Connected
Short answer: Dental sinusitis can happen when an infection or inflammation from an upper tooth irritates the maxillary sinus. If you have toothache together with one-sided sinus pressure, bad taste, nasal symptoms or pain when chewing, you should book a dental assessment.
Dental sinusitis, also called odontogenic sinusitis, means that sinus symptoms are linked to a dental source. This can happen because the roots of the upper molars and premolars are close to the maxillary sinus. A tooth infection, deep decay, failed root canal treatment, gum infection, extraction complication or other dental problem can sometimes create symptoms that feel like ordinary sinusitis.
At Gloss & Floss Dental Care® in Södermalm, Stockholm, we help patients understand whether sinus pressure may be connected to a tooth problem. We assess the teeth, gums, bite, symptoms and dental X-rays when needed, then guide you toward the right next step.
If you already suspect dental sinusitis or sinus perforation after a dental procedure, visit our dedicated service page for dental sinusitis and sinus perforation treatment.
Toothache plus sinus pressure?
Book a dental assessment if sinus pressure is one-sided, returns repeatedly, is combined with upper tooth pain, bad taste, swelling, pain when chewing, or symptoms that do not improve as expected.
Dental sinusitis – quick overview
- Dental sinusitis can mimic ordinary sinusitis, but the source is dental.
- Upper molars and premolars are most relevant because they are close to the maxillary sinus.
- One-sided sinus pressure with toothache is an important clue.
- Antibiotics or nasal sprays alone may not solve the problem if the dental source remains untreated.
- Dental assessment, X-rays and panoramic X-ray when needed help identify whether a tooth is involved.
- Treatment may include root canal treatment, retreatment, extraction or oral surgery, depending on the diagnosis.
What is dental sinusitis?
Dental sinusitis is sinus inflammation caused or maintained by a dental problem. It is different from ordinary sinusitis that starts after a cold, allergy or upper respiratory infection.
The maxillary sinuses sit above the upper back teeth. In some patients, the roots of these teeth are very close to the sinus floor. If infection develops around a root tip, deep cavity, gum pocket or previous dental treatment, the sinus may become irritated or infected.
This is why some patients feel pressure in the cheek, nasal congestion or sinus pain when the real origin is a tooth. The reverse can also happen: ordinary sinus pressure can make upper teeth feel sore even when the teeth are not infected. Careful diagnosis is therefore important.
Is it sinus pain or tooth pain?
Sinus pain and tooth pain can overlap. The difference is not always obvious at home, but the pattern of symptoms can provide clues.
Signs and symptoms of dental sinusitis
Dental sinusitis can look like ordinary sinusitis, but certain details make a dental source more likely. The symptoms may be mild at first or develop gradually.
- Sinus pressure or pain on one side of the face
- Upper molar or premolar toothache
- Pain when biting or chewing
- Nasal congestion, often more noticeable on one side
- Bad taste, unpleasant smell or discharge
- Headache or pressure that worsens when bending forward
- Swollen gums or tenderness around an upper tooth
- Tooth sensitivity to hot, cold or pressure
- Symptoms that return repeatedly despite sinus treatment
If symptoms are severe, rapidly worsening or combined with facial swelling, fever or difficulty opening your mouth, contact dental or medical care urgently.
Common dental causes
The most important step is to identify and treat the dental source. Without addressing the underlying dental problem, sinus symptoms may persist or return.
How dental sinusitis is diagnosed
Diagnosis starts by separating sinus-origin pain from tooth-origin pain. At Gloss & Floss, we assess symptoms, dental history, previous treatments, chewing pain, gum findings, tooth vitality and X-ray findings when needed.
We may use regular dental X-rays or panoramic X-ray to assess upper teeth, root areas, bone support and the relationship to the sinus. If a more advanced radiological assessment is required, or if ENT evaluation is needed, we explain the next step and refer or collaborate appropriately.
Important diagnostic point
Dental sinusitis is often missed when only sinus symptoms are treated. If one upper tooth is painful, if symptoms are one-sided, or if sinus symptoms keep returning, a dental assessment can be important.
You can also read general public information about sinusitis from 1177 Vårdguiden.
Treatment options for dental sinusitis
The right treatment depends on what is causing the problem. The key principle is to treat the dental source when a dental origin is confirmed or strongly suspected.
Root canal treatment or retreatment
If the tooth can be saved and the nerve/root system is infected, root canal treatment may be used to remove infection and preserve the tooth. In selected cases, retreatment or apical surgery may be considered.
Extraction when the tooth cannot be saved
If the tooth has a poor prognosis, careful extraction may be needed. Upper molar extractions close to the sinus require careful planning and aftercare instructions.
Management of sinus perforation
If there is an opening between the mouth and sinus after extraction or surgery, it needs prompt assessment. Smaller communications may be managed conservatively or with suturing, while larger or persistent openings may require surgical closure. Read more on our page for dental sinusitis and sinus perforation.
Medication and sinus-care instructions
Medication may sometimes be part of the plan, depending on diagnosis and symptoms. However, medication alone may not solve dental sinusitis if the tooth source remains untreated.
Collaboration with ENT specialists
Some cases need collaboration with an ear, nose and throat specialist, especially when sinus symptoms are persistent, complex or not explained by the dental findings alone.
Suspect a tooth-related sinus problem?
A dental assessment can help clarify whether your sinus pressure is linked to an upper tooth, root infection, extraction complication or another dental cause.
What you can do while waiting for your appointment
Self-care can reduce discomfort temporarily, but it should not replace dental assessment if symptoms are persistent, one-sided, worsening or linked to a specific upper tooth.
- Avoid chewing on the painful side.
- Keep the mouth clean with gentle brushing and interdental cleaning.
- Use over-the-counter pain relief according to package instructions if suitable for you.
- Do not place aspirin or strong substances directly on the gum or tooth.
- If you use saline nasal rinse, follow product instructions carefully.
- Contact dental care quickly if swelling, fever, bad taste, pus or severe pain develops.
When is it urgent?
Dental sinusitis is not always an emergency, but certain symptoms need faster attention.
Contact dental or medical care urgently if you have:
- Facial swelling or rapidly increasing swelling
- Fever or feeling generally unwell with dental pain
- Pus, bad taste or drainage from the gum
- Severe pain that prevents eating or sleeping
- Difficulty opening your mouth
- Fluid or air passing between mouth and nose after an upper tooth extraction
- Difficulty breathing or swallowing — seek emergency medical help immediately
How to prevent dental sinusitis
Prevention focuses on reducing the risk of untreated tooth infection and gum disease in the upper jaw.
- Attend regular dental check-ups.
- Treat cavities before they reach the nerve.
- Do not postpone treatment for upper molar pain.
- Keep gums healthy with professional cleaning and good home care.
- Follow aftercare instructions carefully after upper tooth extractions.
- Plan implants in the upper jaw with attention to sinus anatomy and bone volume.
Why choose Gloss & Floss for dental sinusitis assessment?
Dental sinusitis requires careful thinking because the symptoms may sit between dentistry and ENT care. At Gloss & Floss, we help patients understand whether the tooth, gum, sinus area or previous dental treatment may be part of the problem.
Related dental services
Frequently asked questions about dental sinusitis
What is dental sinusitis?
Dental sinusitis is sinus inflammation linked to a dental source, usually from an upper tooth, root infection, gum infection, extraction complication or dental procedure near the maxillary sinus.
Can a tooth infection cause sinus pain?
Yes. Infection around an upper molar or premolar can irritate the maxillary sinus and cause cheek pressure, nasal symptoms or pain that feels like sinusitis.
How do I know if sinus pain is coming from a tooth?
One-sided symptoms, upper tooth pain, pain when biting, bad taste, swelling near a tooth or symptoms that do not improve with ordinary sinus treatment may suggest a dental source.
Can ordinary sinusitis make my teeth hurt?
Yes. Sinus pressure can make several upper back teeth feel sore, especially during a cold or sinus infection. If pain becomes localised to one tooth or persists, dental assessment is recommended.
Does dental sinusitis go away with antibiotics?
Antibiotics may sometimes reduce symptoms temporarily, but if the dental source remains untreated, symptoms may persist or return. The underlying tooth or gum problem often needs treatment.
How is dental sinusitis diagnosed?
Diagnosis usually includes symptom review, dental examination, assessment of upper teeth and gums, and dental X-rays or panoramic X-ray when needed. Complex cases may require further imaging or ENT assessment elsewhere.
What treatment is needed for dental sinusitis?
Treatment depends on the cause. It may include root canal treatment, retreatment, extraction, management of sinus perforation, medication, oral surgery assessment or ENT collaboration.
What is sinus perforation after tooth extraction?
A sinus perforation means that a small opening has formed between the mouth and the maxillary sinus, often after extraction of an upper molar. It needs prompt dental assessment and specific aftercare.
Can I get an implant after dental sinusitis?
Often, implant planning is possible later, but infection and sinus conditions must first be stable. In some upper-jaw cases, sinus lift or bone assessment may be needed before implants.
When should I seek urgent care?
Seek urgent care if you have facial swelling, fever, severe pain, pus, difficulty opening your mouth, fluid or air passing between mouth and nose after extraction, or difficulty breathing or swallowing.
Can Gloss & Floss diagnose dental sinusitis without CBCT?
We can perform clinical assessment and use dental X-rays or panoramic X-ray when needed. If advanced imaging or ENT evaluation is required, we explain the next step and refer or collaborate appropriately.
Book a dental assessment in Stockholm
If you have toothache together with sinus pressure, do not rely on guesswork. Dental sinusitis can be missed when only sinus symptoms are treated. A dental assessment can help identify whether an upper tooth is part of the problem.
Book help for toothache and sinus pressure
We assess upper teeth, gums, dental history and imaging needs to help clarify whether your sinus symptoms may have a dental origin.
This page is for general information only and does not replace a personalised diagnosis from a dentist, physician or ENT specialist.
