What Can a Sinus CT Reveal About Persistent Facial Pressure?

Persistent pressure around the cheeks, forehead, eyes, or bridge of the nose is often described as “sinus pressure.” However, facial pressure does not always originate in the sinuses. Migraine, jaw joint problems, dental conditions, nerve pain, and other disorders can produce similar symptoms.

A sinus CT may help determine whether objective signs of sinus inflammation or structural narrowing are present. Just as importantly, a relatively clear CT may suggest that another source of facial pressure should be considered.

At West Palm Beach Breathe Free, patients can receive an evaluation to determine whether persistent facial pressure appears related to the nose and sinuses and whether CT imaging or another diagnostic approach may be appropriate.

Direct Answer: What Can a Sinus CT Reveal?

A sinus CT can show thickened sinus tissue, trapped fluid, blocked drainage pathways, nasal polyps, structural differences, or another abnormality that may be associated with facial pressure.

However, a CT cannot prove that every abnormality it shows is causing the patient’s symptoms. Mild sinus changes are sometimes found in people without significant sinus disease. The results must be interpreted alongside the patient’s symptom pattern, medical history, physical examination, and nasal endoscopy when performed.

What Is a Sinus CT Scan?

A sinus CT scan is an imaging examination that uses specialized X-ray equipment and computer processing to create cross-sectional images of the nasal passages, sinus cavities, drainage pathways, and surrounding bony structures.

Unlike a conventional X-ray, CT images can be reviewed in multiple planes. This allows a provider to assess areas that cannot be completely seen during a routine office examination.

Sinus CT imaging may be used to:

• Evaluate suspected chronic or recurrent sinus disease
• Look for fluid or thickened sinus tissue
• Identify narrowed or obstructed drainage pathways
• Assess structural differences
• Investigate an unusual or one-sided finding
• Evaluate possible complications
• Provide anatomical information for treatment planning

Routine sinus CT scans are commonly performed without contrast. Contrast, MRI, or another imaging study may be recommended when a provider needs more information about a mass, complication, blood vessel, or surrounding soft tissue.

What Happens During a Sinus CT?

The exact process depends on the imaging equipment. With a conventional scanner, the patient generally lies on a table that moves through a circular opening while images are captured from different angles.

Some ENT offices use specialized equipment that allows the patient to sit or stand. The imaging portion is generally brief and noninvasive, although the total appointment time varies.

Patients should remain still while images are captured. They should also tell the provider if they may be pregnant, have recently undergone other imaging examinations, or have concerns about radiation exposure.

What Sinus Findings May Be Relevant to Facial Pressure?

A sinus CT may reveal several findings that could be relevant when facial pressure occurs with nasal or sinus symptoms.

Thickened sinus tissue

Inflammation can cause the mucosal lining inside a sinus to become thicker. This may appear as gray or white tissue along the walls of a sinus that would normally be filled with air.

Mucosal thickening can occur with chronic inflammation, a recent respiratory infection, allergies, or other conditions. Its presence does not automatically establish that it is the source of facial pressure.

Fluid or sinus opacification

A CT may show fluid inside a sinus or an area where normal air space has been replaced by inflammatory tissue or secretions. This is known as partial or complete opacification.

These findings may support a diagnosis involving sinus inflammation when they correspond with symptoms such as nasal obstruction, discolored drainage, reduced smell, or recurring infections. Imaging alone cannot always determine whether the underlying cause is viral, bacterial, fungal, dental, or inflammatory.

Blocked sinus drainage pathways

The sinuses drain through relatively small openings. Swelling, structural narrowing, polyps, or another condition may obstruct these pathways and interfere with ventilation or mucus drainage.

A CT can map deeper drainage anatomy that cannot be completely evaluated during a standard office examination. This may help a provider understand whether the pattern of inflammation corresponds with the location of the patient’s symptoms.

Chronic rhinosinusitis

Chronic rhinosinusitis involves symptoms that persist for at least 12 weeks. These symptoms generally include nasal obstruction or drainage, with possible facial pressure and reduced smell.

A diagnosis requires more than facial pressure alone. Objective signs of inflammation should also be identified through nasal endoscopy, CT imaging, or another appropriate examination.

A CT may show how many sinuses are affected, whether inflammation is concentrated on one side, and whether drainage pathways appear narrowed or blocked.

Nasal polyps or another soft-tissue finding

Nasal polyps are noncancerous growths associated with inflammation of the nasal and sinus lining. They may contribute to congestion, reduced smell, postnasal drip, and impaired sinus drainage.

A CT may show soft-tissue changes consistent with polyps and indicate how extensively the sinus cavities are involved. However, CT cannot always distinguish a routine inflammatory polyp from every other type of soft-tissue abnormality. Nasal endoscopy, MRI, or biopsy may be needed when a finding is unusual or limited to one side.

A deviated septum

The nasal septum separates the left and right nasal passages. A significant deviation can narrow one side and alter airflow.

A CT can show the position of the septum and its relationship to other nasal structures. However, a deviated septum does not automatically cause facial pressure or sinus disease. Many people have some degree of deviation without meaningful symptoms.

The provider must determine whether the finding corresponds with nasal obstruction, impaired drainage, or other clinical evidence.

Enlarged turbinates

Turbinates are structures along the nasal sidewalls that warm, humidify, and filter inhaled air. Their soft tissue may swell in response to allergies, irritants, infection, or other inflammation.

A CT may show turbinate enlargement or reduced space in the nasal airway. Because turbinate swelling can change throughout the day, an office examination or nasal endoscopy is also important.

Enlarged turbinates commonly contribute to nasal obstruction but are not, by themselves, a clear explanation for persistent facial pain or pressure.

Dental-related inflammation

The upper teeth are located close to the maxillary sinuses in the cheeks. A dental infection, extraction, implant, or another dental problem may occasionally produce inflammation in a nearby sinus.

A CT may show a pattern that raises concern for a dental source, particularly when changes are concentrated in one maxillary sinus. A sinus CT does not replace a dental examination or dedicated dental imaging, and further evaluation may be recommended.

An uncommon growth or mass

Most facial pressure is not caused by a tumor. Nevertheless, CT imaging may occasionally reveal an abnormal soft-tissue area, expansion of a sinus, or changes involving the surrounding bone.

Additional imaging, nasal endoscopy, or biopsy may be necessary to determine what the finding represents. A CT scan alone cannot identify every mass with certainty.

What If the Sinus CT Is Normal?

A clear or nearly clear CT can be clinically useful. It may indicate that significant sinus inflammation is unlikely to explain the facial pressure and that another cause should be investigated.

Conditions that can resemble sinus pressure include:

• Migraine
• Tension-type headache
• Temporomandibular joint disorders
• Dental infection or tooth grinding
• Nerve-related facial pain
• Eye strain or certain eye conditions
• Medication-related headache
• Other neurological conditions

Migraine can cause facial pressure, nasal congestion, watery eyes, and pain around the forehead or cheeks. Those symptoms can make it feel like a sinus condition even when the sinuses are not significantly inflamed.

Treatment directed at the sinuses may not improve facial pressure when another headache or pain disorder is responsible.

Does Everyone With Facial Pressure Need a CT?

No. CT imaging is not routinely necessary for every headache, episode of facial pressure, cold, or uncomplicated case of acute sinusitis.

A provider may consider a sinus CT when:

• Symptoms consistent with chronic sinusitis have continued for at least 12 weeks
• Symptoms persist despite appropriate treatment
• Sinus infections recur
• Nasal endoscopy identifies an abnormality
• One-sided symptoms or bloody drainage require further evaluation
• A complication is suspected
• Detailed anatomy is needed for procedure planning
• The diagnosis remains uncertain after an examination

Facial pressure or an intense headache by itself is not enough to establish the need for sinus imaging. The symptom pattern and examination findings help determine whether CT is likely to answer a relevant clinical question.

CT imaging uses ionizing radiation. It should be ordered when the expected diagnostic value outweighs the potential risk and when another examination using less or no radiation would not answer the same question as effectively.

When Should Persistent Facial Pressure Be Evaluated?

Consider scheduling an evaluation when facial pressure:

• Persists or repeatedly returns
• Occurs with nasal obstruction or drainage
• Is accompanied by a reduced sense of smell
• Remains worse on one side
• Does not improve with appropriate care
• Occurs with recurring sinus infections
• Interferes with sleep, work, or daily activities
• Has an unclear cause

Seek prompt medical attention for facial pressure accompanied by:

• Swelling or redness around the eyes
• Vision changes
• Facial weakness or numbness
• Confusion
• Neck stiffness
• A sudden or unusually severe headache
• High fever with worsening symptoms
• Neurological changes
• Significant facial swelling

Understanding What a Sinus CT Can—and Cannot—Show

A sinus CT may identify inflammation, trapped fluid, blocked drainage pathways, polyps, structural differences, or another abnormality that could be relevant to facial pressure. It can also help show when the sinuses do not appear to be the source of the symptoms.

The scan is most useful when its findings are interpreted alongside a detailed history and examination. West Palm Beach Breathe Free provides ear, nose, and throat evaluations for patients in West Palm Beach and surrounding communities.

Contact the team to discuss persistent facial pressure and determine whether nasal endoscopy, sinus CT imaging, or another evaluation may be appropriate.