What does it mean when someone says they have “sinus”? Most of the time, these patients have chronic sinusitis. This is often not a bacterial infection, but instead an inflammation or swelling of the lining of the sinus cavities. Treatment usually starts with steroid nasal sprays and nasal irrigations, but can include surgical intervention. Your doctor can diagnose this with good examination and CT scans of the sinuses. Do not just live with your “sinus”. It can be helped.