Sinusitis
Sinusitis is the inflammation or swelling of the tissue lining the sinuses, which are hollow spaces in the bones around the nose. When these cavities become blocked and filled with fluid, germs can grow and cause an infection. This condition often leads to facial pressure and a stuffed-up feeling in the nose.
Overview
Sinusitis is the inflammation or swelling of the tissue lining the sinuses, which are hollow spaces in the bones around the nose. When these cavities become blocked and filled with fluid, germs can grow and cause an infection. This condition often leads to facial pressure and a stuffed-up feeling in the nose.
Most cases of sinusitis are short-term and triggered by a common cold or allergies. However, some people may develop chronic sinusitis, which lasts for several weeks or months. Treatment typically focuses on reducing inflammation and clearing the nasal passages to restore normal drainage.
Understand this condition
The sinuses are air-filled cavities that produce thin mucus to keep the nasal passages moist. When the lining of these cavities becomes inflamed, mucus cannot drain properly and builds up. This buildup creates pressure and provides an environment where bacteria can multiply.
Why it happens
It happens when a trigger, like a virus or allergen, causes the sinus lining to swell and trap mucus. The blockage prevents normal air circulation, leading to a buildup of pressure within the facial bones. If the blockage persists, bacteria may grow in the stagnant fluid, causing an infection.
Real-world scenarios
- •People may notice facial pain that worsens when bending forward.
- •This often appears as thick yellow or green nasal discharge.
- •This often appears as a lingering cold that lasts over ten days.
- •People may notice a reduced sense of smell and taste.
Common vs serious explanations
- •Lingering inflammation from a recent viral cold
- •Seasonal allergy flare-ups causing nasal swelling
- •Irritation from dry indoor air or dust exposure
- •Non-allergic rhinitis triggered by strong odors or pollutants
- Orbital cellulitis, which is an infection of the eye socket
- Meningitis causing inflammation of the brain and spinal cord membranes
- Brain abscess resulting from an untreated sinus infection
- Blood clots in the cavernous sinus behind the eyes
Symptoms
Click any symptom to analyzeCauses
- •Viral infections like the common cold
- •Bacterial infections following a cold
- •Allergic rhinitis or seasonal allergies
- •Nasal polyps or small growths in the nose
- •Deviated nasal septum blocking airflow
- •Fungal infections in individuals with weak immune systems
- •Environmental pollutants or tobacco smoke
- •Dental infections spreading to the sinuses
Risk factors
- •History of asthma or seasonal allergies
- •Structural issues like a deviated septum
- •Exposure to secondhand smoke or pollution
- •Weakened immune system from medical conditions
- •Cystic fibrosis or other mucus-affecting disorders
- •Frequent use of nasal decongestant sprays
- •Recent upper respiratory tract infection
- •Growth of nasal polyps obstructing drainage
How it progresses
3 stages- OnsetSymptoms appear, often triggered by a known cause.Often missed
- Active phaseSymptoms peak; self-care or short treatment usually helps.
- ResolutionSymptoms ease over days to weeks with proper care.
How it's diagnosed
- •Clinical evaluation by a healthcare professional
- •Review of medical history and symptoms
- •Targeted physical examination
- •Laboratory or imaging tests when indicated
Treatment options
General educational information only — no dosage advice. Always follow guidance from a qualified clinician.
- •Saline nasal sprays or rinses to clear mucus
- •Over-the-counter decongestants for short-term relief
- •Corticosteroid nasal sprays to reduce inflammation
- •Pain relievers like ibuprofen or acetaminophen
- •Antibiotics if a bacterial infection is suspected by a doctor
- •Surgery to clear obstructions in chronic or severe cases
- •Staying hydrated to keep mucus thin and draining
- •Warm compresses applied to the nose and cheeks
Complications
- •Breathing difficulty
- •Spread to airway
- •Dehydration
- •Recurrence of sinusitis
Prevention
- •Wash hands frequently
- •Avoid close contact with infected people
- •Stay up to date with vaccines
- •Maintain a healthy lifestyle
- •See a clinician for routine check-ups
When to seek help
- •Symptoms persist beyond a few days
- •Symptoms interfere with daily activities
- •New or worsening symptoms appear
- •Concerning changes related to sinusitis
- High fever that persists for several days
- Severe headache that does not improve with medication
- Confusion or sudden changes in mental state
- Swelling or redness around the eyes
- Vision changes or double vision
- Stiff neck and sensitivity to bright light
In any emergency, call your local emergency number or go to the nearest emergency department.
Real-world questions
- ›Can Sinusitis cause headaches?
- ›Is Sinusitis reversible?
- ›How quickly does Sinusitis progress?
- ›Is Sinusitis hereditary?
- ›Can Sinusitis be prevented?
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Frequently asked questions
Possible causes of Sinusitis include Viral infections like the common cold, Bacterial infections following a cold, Allergic rhinitis or seasonal allergies, Nasal polyps or small growths in the nose.
Sinusitis is generally moderate, but severity can vary. Seek care if symptoms are severe or persistent.
Duration varies between individuals. Many cases improve with appropriate care, while others may persist longer and require ongoing management.
Some milder cases may improve with rest and self-care. If symptoms persist or worsen, consult a healthcare professional.
Consider seeing a clinician if symptoms are severe, persistent, worsening, or if you have any concerns related to general.
Sources
Information based on general medical references such as:
Last reviewed: May 2026