Sinusitis (Rhinosinusitis)

Sinusitis, commonly known as a sinus infection, occurs when the lining of the nose and sinuses becomes inflamed. The medical term rhinosinusitis is often used because the condition usually affects both the nasal passages and the sinuses. Sinusitis can cause sinus congestion, facial pressure, headache, nasal drainage, and difficulty breathing through the nose. Although it can develop after a viral infection, not every case is caused by bacteria or requires antibiotics.

Sinusitis can be acute and short-lived or become persistent and develop into chronic sinusitis. Allergies, nasal polyps, structural problems, and ongoing inflammation can contribute to chronic or recurrent symptoms. Treatment depends on the underlying cause, severity, and duration of the condition and may range from saline irrigation and medications to sinus surgery in selected cases.

This guide explains the symptoms, causes, types, diagnosis, treatment options, and surgical approaches for sinusitis and rhinosinusitis, including when to consider medical evaluation or surgery.

What Is Sinusitis?

Sinusitis is inflammation of the tissues lining the sinuses and nasal passages. Because inflammation commonly affects both areas, doctors may use the term rhinosinusitis rather than sinusitis alone.

The sinuses are air-filled spaces within the bones surrounding the nose and eyes. They are connected to the nasal cavity through small drainage openings. Normally, mucus produced by the sinus lining drains through these openings into the nose.

When inflammation causes the lining to swell, the drainage pathways can become narrowed or blocked. Mucus may then accumulate inside the sinuses, leading to congestion, pressure, discomfort, and other sinus infection symptoms.

A sinus infection can be caused by a virus or, in some cases, bacteria. However, inflammation does not always mean that an infection is present. Allergies, nasal polyps, structural abnormalities, and other inflammatory conditions can also cause rhinosinusitis.

What Are the Paranasal Sinuses?

The paranasal sinuses consist of four paired groups:

• Maxillary sinuses: Located beneath the eyes within the cheekbones.

• Frontal sinuses: Located in the forehead above the eyes.

• Ethmoid sinuses: Located between the eyes and alongside the upper part of the nose.

• Sphenoid sinuses: Located deep within the skull, behind the nasal cavity.

Sinusitis can affect one or several of these sinus groups.

What Causes Sinusitis?

A number of factors can cause or contribute to sinusitis. Viral respiratory infections, including the common cold, are among the most frequent triggers of acute sinusitis. The resulting inflammation can cause the nasal and sinus passages to swell, making it more difficult for mucus to drain normally.

Other sinusitis causes include:

• Allergies and allergic rhinitis

• Nasal polyps

• A deviated septum

• Narrow sinus drainage pathways

• Recurrent respiratory infections

• Exposure to cigarette smoke and other irritants

• Certain immune system disorders

• Fungal infections in specific circumstances

A bacterial sinus infection can sometimes develop following a viral infection. However, the presence of thick or discolored nasal mucus alone does not necessarily mean that a sinus infection is bacterial.

Structural problems can also contribute to recurrent or chronic sinusitis. For example, a deviated septum or nasal polyps may interfere with normal sinus drainage. In these cases, treating the underlying condition may be an important part of long-term management.

Is Sinusitis Always Caused by an Infection?

No. The terms sinusitis and sinus infection are often used interchangeably in everyday language, but sinus inflammation can occur without an infection.

Allergies, chronic inflammation, nasal polyps, and anatomical abnormalities can cause symptoms associated with sinusitis without bacteria being responsible. Identifying the underlying cause is therefore important when symptoms persist or repeatedly return.

Types of Sinusitis

Sinusitis can be classified according to how long it lasts and what contributes to the inflammation.

Acute Sinusitis

Acute sinusitis develops over a relatively short period and often follows a viral respiratory infection. Symptoms may include nasal congestion, facial pressure, nasal drainage, headache, and a reduced sense of smell.

Many acute cases improve with supportive treatment and symptom relief. Antibiotics may be considered when a doctor determines that acute bacterial rhinosinusitis is likely.

Chronic Sinusitis

Chronic sinusitis, medically referred to as chronic rhinosinusitis, involves persistent inflammation lasting 12 weeks or longer.

People with chronic sinusitis may experience ongoing nasal congestion, drainage, facial pressure, reduced sense of smell, or difficulty breathing through the nose. Nasal polyps, allergies, structural abnormalities, and other inflammatory factors may contribute to chronic disease.

Treatment may include nasal medications, saline irrigation, management of allergies, and other medical therapies. Surgery may be considered for selected patients whose symptoms remain inadequately controlled despite appropriate medical treatment.

Recurrent Sinusitis

Recurrent sinusitis refers to repeated episodes of acute sinusitis separated by periods of improvement. Patients who experience frequent episodes may benefit from evaluation for underlying allergies, anatomical abnormalities, nasal polyps, or other contributing factors.

Sinus Infection Symptoms

The symptoms of sinusitis vary depending on its cause, severity, and duration. Common sinusitis symptoms and sinus infection symptoms include:

• Nasal congestion or a blocked nose

• Thick nasal drainage

• Postnasal drip

• Facial pain or pressure

• Sinus headache

• Reduced or lost sense of smell

• Cough

• Sore throat

• Bad breath

• Fatigue

• Fever in some cases

• Tooth pain or pressure

• Ear pressure or fullness

Swelling inside the nasal passages can make it difficult to breathe through the nose. When normal mucus drainage is disrupted, secretions may become thicker and more difficult to clear.

Sinus Headache and Facial Pressure

A sinus headache may feel like pressure or pain around the forehead, cheeks, nose, or eyes. Some people notice increased facial pressure when bending forward.

However, not every headache associated with facial pressure is caused by sinusitis. Migraine and other headache disorders can sometimes produce nasal congestion or facial symptoms. If headaches are persistent or recurrent, a medical evaluation can help determine the underlying cause.

Can Sinusitis Cause Tooth Pain?

Yes. Inflammation of the maxillary sinuses can sometimes cause pressure or pain that is felt in the upper teeth because these sinuses are located close to the roots of the upper teeth.

Persistent tooth pain should not automatically be attributed to sinusitis, however. Dental problems can produce similar symptoms and may require assessment by a dentist.

How Long Does a Sinus Infection Last?

The duration of a sinus infection depends on its underlying cause. Viral sinusitis generally improves as the associated respiratory infection resolves. Some cases persist for longer or become worse, particularly when bacterial infection or an underlying condition is involved.

Acute bacterial rhinosinusitis may be suspected when symptoms persist without improvement for at least 10 days or worsen after initially improving. Chronic rhinosinusitis is characterized by symptoms lasting 12 weeks or longer, together with objective evidence of inflammation.

If sinus symptoms are persistent, recurrent, unusually severe, or significantly affecting daily life, an ENT specialist can assess the underlying cause.

Are Sinus Infections Contagious?

Sinusitis itself is not generally considered contagious. However, a viral respiratory infection that triggers sinusitis can spread from person to person.

For example, if sinus symptoms develop after a common cold, the virus responsible for the respiratory infection may be contagious even though the resulting sinus inflammation is not transmitted in the same way.

Practicing good hand hygiene and avoiding close contact with people who have respiratory infections can help reduce the spread of viruses.

How Is Sinusitis Diagnosed?

A doctor typically begins by reviewing the patient's symptoms, their duration, previous episodes, allergies, medications, and medical history. An examination of the nose and throat can provide additional information.

For patients with persistent or recurrent symptoms, an ENT specialist may perform nasal endoscopy. During this procedure, a thin camera is used to examine the nasal passages and areas around the openings of the sinuses.

A CT scan may be recommended in selected cases, particularly when chronic sinusitis, structural abnormalities, complications, or surgery are being considered.

Routine imaging is generally not necessary for uncomplicated acute sinusitis. In chronic rhinosinusitis, objective evidence of inflammation may be obtained through nasal endoscopy or CT imaging.

How to Treat Sinusitis

The appropriate sinusitis treatment depends on whether the condition is acute or chronic and whether it is associated with a viral infection, bacterial infection, allergies, structural problems, or another underlying cause.

Treatment may include saline irrigation, nasal medications, pain relievers, decongestants, or other medications. Antibiotics may be prescribed when bacterial sinusitis is diagnosed or considered likely.

Home Remedies and Sinus Pressure Relief

Mild sinus symptoms can often be managed with supportive measures. Options for sinus pressure relief and sinus infection relief may include:

• Drinking adequate fluids

• Getting sufficient rest

• Using saline nasal sprays

• Performing saline nasal irrigation or a sinus rinse

• Using a humidifier when appropriate

• Applying a warm compress to the face

A sinus rinse or saline irrigation can help remove mucus and irritants from the nasal passages and may improve nasal congestion. Appropriate water and preparation methods should always be used according to the product instructions.

These measures can help relieve symptoms but do not necessarily eliminate an underlying bacterial infection or structural cause.

Medications for Sinusitis

Depending on the cause and symptoms, a doctor may recommend different sinusitis medications or sinus infection medications.

Over-the-Counter Medications for Sinusitis

Over-the-counter medications for sinusitis may include pain relievers, saline nasal sprays, and certain decongestants. Intranasal corticosteroids may also be recommended, particularly when inflammation or allergies contribute to symptoms.

Decongestants can temporarily reduce nasal swelling and improve congestion, but they are not appropriate for everyone. Some can affect blood pressure or interact with other medications, while prolonged use of certain topical nasal decongestants can lead to rebound congestion.

Antihistamines may be useful when allergies contribute to nasal symptoms but are not routinely appropriate for every type of sinusitis.

Antibiotics for Sinus Infection

Antibiotics for sinus infection are not necessary for every case. Many acute sinus infections are caused by viruses and improve without antibiotic treatment.

When a doctor determines that bacterial sinusitis is likely, antibiotics may be prescribed based on the patient's symptoms, medical history, allergies, and other factors. Unnecessary antibiotic use can contribute to antibiotic resistance and cause side effects.

For this reason, antibiotics should be taken under medical guidance rather than automatically whenever sinus symptoms develop.

When Is Sinus Surgery Needed?

Most people with acute sinusitis do not need surgery. Sinus surgery may be considered when chronic or recurrent symptoms persist despite appropriate medical treatment, when anatomical problems interfere with normal sinus drainage, or in selected patients with conditions such as nasal polyps or certain forms of fungal sinus disease.

Surgery may also be considered when there are complications or when the underlying sinus disease cannot be adequately managed with medication alone.

Before recommending surgery, an ENT specialist evaluates the patient's symptoms, medical history, nasal anatomy, and response to previous treatments. Nasal endoscopy and CT imaging may be used to identify the affected sinuses and determine the extent of disease.

The purpose of surgery is generally to improve sinus drainage and ventilation, remove obstructing or diseased tissue when necessary, and create better conditions for ongoing medical treatment.

Types of Sinus Surgery

Several surgical techniques can be used to treat sinus disease. The most appropriate procedure depends on the affected sinuses, underlying cause, anatomy, previous treatments, and individual patient needs.

Endoscopic Sinus Surgery

Endoscopic sinus surgery is performed through the nostrils using a small camera and specialized instruments. This approach allows the surgeon to access the sinus drainage pathways without external facial incisions.

Depending on the patient's condition, the surgeon may widen blocked drainage pathways or remove polyps and other tissue that obstruct normal sinus function.

Functional Endoscopic Sinus Surgery (FESS)

Functional endoscopic sinus surgery (FESS) is an endoscopic technique used for selected patients with chronic rhinosinusitis and other sinus disorders.

The objective is to restore or improve the natural drainage pathways of the sinuses while preserving healthy tissue as much as possible. The extent of surgery depends on which sinuses are affected and the underlying disease.

FESS may be considered when appropriate medical treatment has not provided sufficient control of chronic sinus symptoms.

Balloon Sinuplasty

Balloon sinuplasty, also known as balloon sinus dilation, uses a small balloon catheter to widen selected sinus drainage openings.

The balloon is inserted through the nasal passages and gently inflated to expand the targeted opening. Balloon dilation can be appropriate for selected patients and may sometimes be combined with other endoscopic techniques.

It is not suitable for every type of sinus disease, so an ENT specialist must determine whether it is appropriate based on the patient's anatomy and diagnosis.

Caldwell-Luc Surgery

Caldwell-Luc surgery is an older surgical technique that provides access to the maxillary sinus through the upper gum and the wall of the sinus.

Modern endoscopic techniques are commonly used for many sinus conditions, but the Caldwell-Luc approach can still have specific applications in selected cases. The choice of procedure depends on the location and nature of the sinus disease and the patient's individual anatomy.

Sinus Surgery Recovery

Recovery following sinusitis surgery varies depending on the surgical technique and the extent of disease.

Temporary nasal congestion, drainage, mild discomfort, and changes in the sense of smell can occur during the early recovery period. Patients may be advised to use saline irrigation and attend follow-up appointments to monitor healing.

Some patients require continued nasal medication after surgery to control inflammation and reduce the risk of recurrent symptoms. Following the surgeon's postoperative instructions is an important part of recovery.

Can Sinusitis Cause Complications?

Most cases of sinusitis resolve without serious complications. However, some sinuses are located close to the eyes and structures within the skull, meaning severe sinus disease can rarely spread to nearby tissues.

Urgent medical assessment is particularly important if sinusitis is accompanied by swelling or redness around the eye, vision changes, severe headache, confusion, neurological symptoms, or significant deterioration.

Persistent or recurrent sinusitis should also be evaluated to identify underlying conditions such as nasal polyps, allergies, immune problems, or structural abnormalities.

How to Prevent Sinusitis

It is not always possible to prevent sinusitis, but several measures may help reduce the risk of recurrent symptoms.

Managing allergies, avoiding cigarette smoke and other nasal irritants, practicing good hand hygiene, and treating underlying nasal conditions can support healthy nasal and sinus function.

People who experience recurrent sinusitis may benefit from an ENT evaluation to determine whether allergies, nasal polyps, a deviated septum, or another structural problem is contributing to repeated episodes.

Sinusitis vs. a Cold or Allergies

Sinusitis can initially resemble a common cold because both conditions can cause nasal congestion, runny nose, cough, and fatigue. However, symptoms that persist, worsen after initially improving, or are accompanied by significant facial pressure may require further evaluation.

Allergies can also cause congestion, runny nose, sneezing, and a reduced sense of smell. Unlike an infection, allergic symptoms are generally related to exposure to specific allergens and may recur seasonally or persist while the trigger remains present.

Because these conditions can overlap, persistent symptoms should not be diagnosed based on symptoms alone.

When Should You See a Doctor for Sinusitis?

Mild sinus symptoms often improve with supportive care. Medical evaluation is recommended when symptoms are persistent, recurrent, severe, or significantly affecting quality of life.

Prompt medical attention is particularly important if you experience severe facial pain, significant swelling around the eyes, vision changes, severe headache, neurological symptoms, or other signs of a potentially serious complication.

An ENT specialist can evaluate persistent or recurrent symptoms and determine whether medication, further diagnostic testing, treatment of an underlying condition, or sinus surgery may be appropriate.

Sinusitis Treatment at Medical Park

At Medical Park, sinusitis treatment is planned according to the cause, type, severity, and duration of the patient's symptoms. ENT specialists evaluate each patient individually and may use nasal endoscopy or CT imaging when necessary to identify inflammation, blocked sinus drainage pathways, nasal polyps, or structural problems affecting sinus function.

For international patients considering sinusitis treatment in Turkey, Medical Park offers both medical and surgical approaches based on individual treatment needs. Medical treatment may include medications, saline irrigation, nasal sprays, and other therapies to control inflammation, improve sinus drainage, and relieve symptoms. Underlying conditions such as allergies, nasal polyps, or structural problems can also be addressed when they contribute to chronic or recurrent sinusitis.

If a patient also has concerns about the appearance or structure of the nose, rhinoplasty may be discussed separately or, in selected cases, performed alongside functional nasal procedures when clinically appropriate.

When sinus symptoms continue despite appropriate medical treatment, sinus surgery at Medical Park may be considered. Depending on the patient's diagnosis and anatomy, procedures may include endoscopic sinus surgery, FESS, or balloon sinuplasty.

For patients researching sinus surgery in Turkey, Medical Park provides individualized surgical evaluation and treatment planning, with international patient services available to help coordinate appointments, treatment, and care during their stay.