If you have been referred to an ENT or nose and sinus specialist in Edinburgh, you may be wondering why investigations such as scans or blood tests are sometimes needed. Many patients worry that tests automatically mean surgery—but in reality, investigations are often used to avoid unnecessary procedures and guide the right treatment.

At your consultation, Mr Gohil uses investigations selectively and thoughtfully, ensuring each test has a clear purpose and benefit.

Why Do I Need a CT Scan of My Sinuses?

A CT scan of the sinuses is one of the most commonly requested investigations in rhinology. It provides highly detailed images of the sinus cavities, nasal passages, and surrounding bone.

Unlike an X-ray, a sinus CT scan shows:

• Blocked or narrowed sinus drainage pathways

• Inflammation or thickened sinus lining

• Nasal polyps

• Structural issues such as a deviated septum

Importantly, a CT scan is not always required. It is usually recommended when symptoms are persistent, severe, or not responding to treatment—or when surgery is being considered. For many patients, a scan helps confirm the diagnosis and ensures treatment is precisely targeted.

CT vs MRI: Which Scan Is Used for Nasal Conditions?

Patients often ask whether they need a CT scan or MRI. The answer depends on the problem being investigated.

• CT scans are best for evaluating the sinuses and nasal anatomy. They show bone detail clearly and are the gold standard for sinus disease.

• MRI scans are reserved for specific situations, such as assessing soft tissue abnormalities, tumours, or problems involving the eye or brain.

Once Mr Gohil has assessed your concerns in clinic, he will be able to guide you as to which scanning method - if any - would be helpful for you.

What a Sinus CT Scan Can—and Can’t—Show

A sinus CT scan is excellent for identifying:

• Chronic sinus inflammation

• Nasal polyps

• Blocked sinuses

• Anatomical variations affecting breathing or drainage

However, it’s important to understand what a CT scan cannot do. It does not always explain:

• Why symptoms fluctuate

• Whether symptoms are allergy-related

• Whether pain is sinus-related or due to another cause

This is why scans are always interpreted alongside your symptoms, examination findings, and medical history—not in isolation.

Blood Tests in Nasal & Sinus Disease: When Are They Needed?

Blood tests are not routinely required for every ENT patient. When they are requested, it is usually to investigate underlying factors contributing to nasal or sinus problems.

Blood tests may help identify:

• Allergic tendencies

• Immune system issues

• Inflammatory conditions

• Rare causes of persistent sinus disease

For patients with recurrent infections, severe nasal polyps, or unusual symptoms, blood tests can provide valuable insight and help tailor treatment more effectively. It should also be noted that urine tests can be useful when considering a variety of nasal conditions.

Investigating Chronic Sinusitis and Nasal Polyps

Chronic rhinosinusitis is one of the most common conditions assessed by the Edinburgh nose and sinus surgeon. It is defined by ongoing symptoms such as nasal blockage, facial pressure, post-nasal drip, or loss of smell lasting more than 12 weeks.

In these cases, investigations often include:

• Flexible nasoendoscopy

• Sinus CT scanning

• Occasionally blood tests or allergy assessment

For patients with nasal polyps, investigations help determine severity, guide medical treatment, and decide whether surgery is likely to help—or whether newer medical therapies may be more appropriate.

Allergy Testing and Its Role in Nasal Disease

Allergies play a significant role in many nasal and sinus conditions. Symptoms such as congestion, sneezing, itching, and runny nose may be driven by allergic inflammation rather than infection or structural problems.

Allergy testing may be recommended to:

• Identify triggers such as pollen, dust mites, or animals

• Guide medical treatment

• Reduce flare-ups of sinus disease

Understanding allergic contributions can significantly improve long-term symptom control and reduce the need for repeated antibiotics or surgery.

When Investigations Help Avoid Surgery

One of the most important roles of investigations is helping avoid unnecessary surgery. Many patients assume that seeing a specialist automatically leads to an operation—but this may not be the case.

Investigations allow Mr Gohil to:

• Confirm whether symptoms truly come from the nose or sinuses

• Identify patients who will benefit from medical treatment alone

• Avoid operating when surgery is unlikely to help

When surgery is recommended, investigations ensure it is appropriate, targeted, and evidence-based, improving outcomes and recovery.

A Personalised, Evidence-Based Approach

Every patient’s nose and sinuses are different. Investigations are not ordered routinely—they are chosen carefully to answer specific questions and guide the best possible treatment.

If you are seeing Mr Gohil, an experienced nose and sinus surgeon in Edinburgh, investigations are used to provide clarity, reassurance, and a personalised plan—whether that involves medication, monitoring, or surgery.

Understanding why tests are ordered can help you feel informed, empowered, and confident in your care.