Sinusitis is an inflammation, or swelling, of the tissue lining your sinuses. Sinuses are structures inside your face that are normally filled with air. Bacterial infections, viral infections and allergies can irritate …

Jan 28, 2025 · A sinus infection occurs when your nasal cavities become swollen, infected, or inflamed. Learn about the symptoms and how to treat them.

2 days ago · When a severe sinus infection goes untreated or worsens, bacteria can erode through these barriers or enter the bloodstream, allowing infection to spread. Once inside, bacteria can …

Apr 17, 2024 · When you have a sinus infection, one or more of your sinuses becomes inflamed. Fluid builds up, which can cause congestion and runny nose.

Nov 22, 2025 · Sinusitis, also known as a sinus infection, can cause symptoms such as facial pain, congestion, and headache.

Aug 29, 2023 · Acute sinusitis causes the spaces inside the nose, known as sinuses, to become inflamed and swollen. Acute sinusitis makes it hard for the sinuses to drain. Mucus builds up. Acute …

Jun 29, 2025 · Sinusitis (inflamed sinuses) is sometimes caused by an infection, but there are several types (such as chronic or recurrent). Find all the symptoms.

Understanding Chronic Sinus Issues and When to Seek Help If you deal with constant congestion, facial pressure, or headaches that never quite go away, you are not alone. Sinus problems affect millions …

Dec 11, 2025 · Sinus infections and colds have similar symptoms, but a sinus infection generally causes more severe facial pain and pressure than a cold with thicker nasal discharge.

The sinuses are cavities, or air-filled pockets, that are near the nose passage. The sinuses make mucus. This fluid cleans the bacteria and other particles out of the air you breathe. What causes sinusitis? A …