Sinus Headaches and Facial Pain: Causes and Diagnosis

Sinus headaches are less common than many people believe. True sinus headache involves facial pressure, nasal congestion, and symptoms that worsen with bending forward. Studies suggest that up to 80% of self-diagnosed sinus headaches are actually migraine. ENT doctors help distinguish between sinus headache and migraine using nasal endoscopy and clinical history.

Key Takeaways

• True sinus headache is rare: Most “sinus headaches” are actually migraine or tension headaches.
• Key difference: Sinus headache always includes nasal congestion or discharge. Migraine may cause facial pain without nasal symptoms.
• Diagnosis: ENT doctors use nasal endoscopy to check for sinus inflammation.
• Red flags: Sudden severe headache, fever with stiff neck, or vision changes require urgent medical attention.
• Treatment: Treat the underlying cause – sinusitis if present, or migraine if that is the diagnosis.

Disclaimer: This information is for educational purposes only and does not constitute medical advice. Individual results vary. Please consult a qualified health practitioner for personal advice about your condition.

What Is a Sinus Headache?

A sinus headache is a headache caused by inflammation or infection of the sinus cavities. When the sinuses become blocked and filled with fluid (pus or mucus), pressure builds up against the sinus walls, causing pain.

However, true sinus headaches are much less common than most people believe. Research studies have shown that:

• Up to 80% of people who think they have sinus headaches actually have migraine
• Only 10-15% of patients with “sinus headache” symptoms actually have sinusitis
• The remaining 5-10% have tension-type headaches or other headache disorders

Why the confusion? Because migraine often causes facial pain and nasal congestion – symptoms that people associate with sinuses.

For authoritative information on headache types, visit the Better Health Channel – Headaches.

True Sinus Headache: Signs and Symptoms

A true sinus headache has the following characteristics:

Core Features (Must Have)

Associated Features

• Fever (in acute sinusitis)
• Reduced sense of smell
• Post-nasal drip
• Bad breath (halitosis)
• Ear fullness or pressure
• Tooth pain (upper teeth, especially molars)

Timing

• Acute sinus headache: Lasts less than 4 weeks (often follows a cold)
• Chronic sinus headache: Lasts more than 12 weeks (with chronic sinusitis)

Important: If you have facial pain but no nasal congestion or discharge, it is very unlikely to be a sinus headache.

Sinus Headache vs. Migraine: Key Differences

Many patients are misdiagnosed with sinus headaches when they actually have migraine. Here is how to tell them apart:

Why Migraine Mimics Sinus Headache

Migraine activates the trigeminal nerve, which supplies sensation to the face, sinuses, and nasal passages. This activation can cause:

• Facial pain (felt in sinus areas)
• Nasal congestion (from nerve-mediated swelling)
• Watery nasal discharge (from nerve-mediated secretion)

Patients feel these symptoms and assume they have a sinus infection – but the sinuses are actually normal.

For more information on migraine diagnosis, visit the Migraine & Headache Australia.

Other Causes of Facial Pain

Not all facial pain is sinus headache or migraine. Other causes include:

For more detailed information on facial pain causes, read our pillar guide: ENT Doctors in Sydney for Nose and Sinus Conditions

Diagnosis of Sinus Headache and Facial Pain

An ENT doctor in Sydney will diagnose the cause of facial pain using the following approaches:

1. Medical History Review

The doctor asks about:

• Pain location, quality, and timing (pressure vs. throbbing? constant vs. episodic?)
• Associated symptoms (nasal congestion, discharge, nausea, light sensitivity)
• Triggers (bending forward, weather changes, certain foods, stress)
• Previous treatments (antibiotics, nasal sprays, migraine medications)
• Past medical history (allergies, sinusitis, migraine, dental problems)

2. Nasal Endoscopy

This is the most important test to determine if the sinuses are actually inflamed.

The doctor passes a thin, flexible tube with a small camera through the nostril (1-2 minutes). The doctor looks for:

3. CT Scan of the Sinuses

A CT scan may be ordered if:

• Nasal endoscopy shows pus or polyps
• Symptoms suggest chronic sinusitis
• The patient is being considered for sinus surgery

What a normal CT scan means: If the CT scan shows clear sinuses with no inflammation, the facial pain is not from sinusitis. The cause is likely migraine, neuralgia, or another headache disorder.

4. Referral to a Neurologist

If nasal endoscopy and CT scan are normal, the ENT doctor may refer the patient to a neurologist (headache specialist) for further evaluation of migraine or other headache disorders.

For information on CT imaging for sinus diagnosis, visit the Royal Australian and New Zealand College of Radiologists (RANZCR) – CT Scan.

Treatment of True Sinus Headache

If the diagnosis is true sinus headache (caused by sinusitis), treatment depends on whether the sinusitis is acute or chronic.

Treatment of Acute Sinusitis (Less than 4 weeks)

Treatment of Chronic Sinusitis (More than 12 weeks)

For more detailed information on sinusitis treatment, read our cluster guide: Chronic Sinusitis: Causes, Symptoms, and Treatment Options

Treatment of Migraine (If That Is the Diagnosis)

If nasal endoscopy and CT scan are normal, the facial pain is likely migraine. Treatment options include:

Acute Migraine Treatment (To Stop an Attack)

Preventive Migraine Treatment (To Reduce Frequency)

For more detailed information on migraine treatment, visit the Migraine & Headache Australia – Treatments.

When to See an ENT Doctor for Facial Pain

You should request a GP referral to an ENT doctor in Sydney if:

• You have facial pain with nasal congestion that does not improve with over-the-counter treatments
• You have been treated for “sinusitis” multiple times with antibiotics but symptoms keep returning
• You have unilateral facial pain (one side only) that persists
• You have nasal endoscopy or CT scan findings suggestive of sinusitis
• You want to confirm whether your facial pain is from sinuses or migraine

If nasal endoscopy and CT scan are normal, the ENT doctor will likely reassure you that your sinuses are healthy and refer you to a neurologist for migraine management.

For more detailed information, read our cluster guide: Nasal Obstruction: When to See an ENT Doctor

Red Flags: When to Seek Urgent Medical Care

Seek immediate medical attention (emergency department or call 000) if you experience:

• Sudden, severe headache (“thunderclap” headache – worst headache of your life)
• Headache with fever and stiff neck (possible meningitis)
• Headache after head injury
• Vision changes (double vision, blurred vision, vision loss)
• Facial swelling spreading to the eye (periorbital oedema)
• Confusion or change in mental state
• Weakness or numbness on one side of the body
• Jaw pain with chewing in a person over 50 (possible giant cell arteritis)

These symptoms may indicate a serious condition such as meningitis, stroke, giant cell arteritis, or infection spreading to the brain.

For more detailed information on red flags, read our cluster guide: Sinus Headaches and Facial Pain: Causes and Diagnosis

Frequently Asked Questions (FAQs)

General FAQs

1. Are sinus headaches common?
   No. True sinus headaches are much less common than most people believe. Up to 80% of self-diagnosed sinus headaches are actually migraine.
2. Can I have a sinus headache without nasal congestion?
   No. True sinus headache always includes nasal congestion or discharge. If you have facial pain without nasal symptoms, it is unlikely to be from sinuses.
3. Can allergies cause sinus headaches?
   Yes. Allergic rhinitis causes nasal swelling and congestion, which can lead to sinus pressure and pain. Treating allergies often improves the headache.
4. How do I know if my headache is from sinuses or migraine?
   See an ENT doctor for nasal endoscopy. If your sinuses look normal, the headache is not from sinuses. A neurologist can then assess for migraine.
5. Can a deviated septum cause facial pain?
   Rarely. A deviated septum causes nasal obstruction but not typically facial pain. If pain is present, look for another cause.

Diagnosis FAQs

6. What test confirms sinus headache?
   Nasal endoscopy (camera through the nostril) shows whether the sinuses are inflamed. A CT scan provides detailed images if sinusitis is suspected.
7. Can a CT scan be normal but I still have sinus pain?
   No. A normal CT scan (clear sinuses) means the pain is not coming from the sinuses. The cause is likely migraine, neuralgia, or another headache disorder.
8. Why do doctors sometimes misdiagnose migraine as sinus headache?
   Because migraine can cause facial pain, nasal congestion, and watery discharge – symptoms that patients and doctors associate with sinuses.
9. What is the difference between acute and chronic sinus headache?
   Acute: less than 4 weeks, often follows a cold. Chronic: more than 12 weeks, associated with chronic sinusitis.
10. Can dental problems cause sinus-like facial pain?
    Yes. Upper tooth infections (especially molars) can spread to the maxillary sinuses and cause facial pain. See a dentist if pain is localized to one tooth.

Treatment FAQs

11. How do you treat a true sinus headache?
    Treat the underlying sinusitis: saline rinses, nasal steroid sprays, antibiotics (if bacterial), or sinus surgery (if chronic).
12. Do antibiotics help sinus headaches?
    Only if the sinus headache is caused by bacterial sinusitis. Most sinus headaches are not bacterial and will not improve with antibiotics.
13. Can sinus headaches be treated without medication?
    Saline rinses, humidifiers, and warm compresses may help. However, true sinus headache often requires medical treatment for the underlying sinusitis.
14. What should I do if my sinus headache does not improve with antibiotics?
    See an ENT doctor. The diagnosis may be incorrect (migraine rather than sinusitis), or you may have chronic sinusitis requiring longer treatment or surgery.
15. Can sinus surgery help sinus headaches?
    Yes, if the headache is caused by chronic sinusitis with blocked sinuses seen on CT scan. If the sinuses are normal, surgery will not help.

Migraine-Related FAQs

16. Can migraine cause nasal congestion?
    Yes. 30-40% of migraine attacks include nasal congestion or watery discharge. This is called “migraine with autonomic symptoms.”
17. What is a “sinus migraine”?
    This is not a formal diagnosis. It refers to migraine attacks that cause facial pain and nasal congestion, mimicking sinusitis.
18. How is migraine treated if it mimics sinus headache?
    The same as any migraine: acute treatments (triptans, analgesics) and preventive treatments (beta-blockers, antidepressants, anticonvulsants).
19. Should I see an ENT or a neurologist for facial pain?
    Start with an ENT to rule out sinus disease. If the ENT finds no sinus problem, ask for a referral to a neurologist (headache specialist).
20. Can weather changes cause sinus headaches or migraine?
    Both. Barometric pressure changes can trigger both sinus pain (if sinuses are already inflamed) and migraine. An ENT can help determine which is occurring.

Summary

Sinus headaches are less common than most people believe. Studies show that up to 80% of self-diagnosed sinus headaches are actually migraine. True sinus headache always includes nasal congestion and worsens with bending forward.

ENT doctors diagnose the cause using nasal endoscopy – a small camera passed through the nostril to directly visualise the sinuses. If the sinuses are normal, the facial pain is not from sinuses, and the patient should be evaluated for migraine or other headache disorders by a neurologist.

For specific medical advice about your condition, please consult a qualified ENT doctor in Sydney such as Dr. Brett Leavers or another registered ENT specialist.