Sinusitis, commonly referred to as a sinus infection, is the inflammation of the sinuses, which are air-filled cavities in the facial bones surrounding the nose. The condition can be categorized into acute and chronic sinusitis based on the duration of symptoms. Acute sinusitis typically lasts for a short period, often resulting from a viral or bacterial infection following a cold. Symptoms include facial pain, nasal congestion, discolored nasal discharge, headache, and fatigue. Chronic sinusitis persists for an extended period, usually more than 12 weeks, and may be associated with underlying factors such as nasal polyps, allergies, or anatomical abnormalities. The symptoms of chronic sinusitis are similar to those of the acute form but may be less severe. Diagnosis involves clinical evaluation, medical history, and sometimes imaging studies like CT scans. Common causes of sinusitis include Viral Infections, Bacterial Infections (often secondary to Viral Infections), allergies, and environmental irritants. Treatment strategies vary depending on the underlying cause and may include antibiotics for Bacterial Infections, decongestants, nasal corticosteroids, and saline nasal irrigation. Severe or recurrent cases may require surgical intervention to address anatomical issues or remove nasal polyps.