Sinusitis is the inflammation or swelling of the tissue lining the sinuses. Healthy sinuses are filled with air, but when they become blocked and filled with fluid, germs can grow and cause infection.
Inflammation of sinus mucosa → edema and obstruction of sinus ostia → impaired mucociliary clearance → mucus accumulation → bacterial proliferation → purulent discharge → symptomatic presentation.
| Type | Duration | Characteristics |
|---|---|---|
| Acute | Up to 4 weeks | Sudden onset, viral or bacterial |
| Subacute | 4-12 weeks | Transitional phase |
| Chronic | Over 12 weeks | Persistent inflammation |
| Recurrent | Multiple episodes/year | 4+ episodes with symptom-free intervals |
Based on symptom criteria (2 major or 1 major + 2 minor symptoms for ≥7 days).
| Test | Purpose | Indications |
|---|---|---|
| Nasal Endoscopy | Direct visualization | Chronic/recurrent cases, treatment failure |
| CT Scan | Detailed sinus anatomy | Chronic sinusitis, preoperative planning |
| MRI | Soft tissue evaluation | Suspected tumors, fungal sinusitis |
| Allergy Testing | Identify allergens | Suspected allergic component |
| Medication Type | Examples | Purpose |
|---|---|---|
| Nasal Corticosteroids | Fluticasone, Mometasone | Reduce inflammation |
| Oral Decongestants | Pseudoephedrine | Relieve congestion |
| Analgesics | Acetaminophen, Ibuprofen | Pain and fever relief |
| Antibiotics | Amoxicillin-clavulanate | Bacterial infections only |
Functional Endoscopic Sinus Surgery (FESS) may be indicated for:
Most cases of acute sinusitis resolve within 7-10 days with appropriate treatment. Chronic sinusitis may require long-term management but generally has a good prognosis with proper treatment.
Routine screening for sinusitis is not recommended. Diagnosis is based on symptomatic presentation.