Mar 9, 2023 · 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 …

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.

Jul 16, 2025 · Sinus infections, or sinusitis, occur when a virus of bacteria enters the sinuses. Read on for a list of common symptoms and treatments.

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 …

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.

Feb 9, 2026 · Sinus infections, also known as acute sinusitis, occur when the air‑filled spaces around your nose become inflamed and swollen. They’re most often caused by common cold viruses and …

Most sinus infections are caused by viruses or bacteria. This can happen when the common cold, the flu, COVID-19, allergies, or another illness causes your sinus tissue to swell, leading to a buildup of …

Sinusitis is one of the most common medical conditions. Sinusitis may occur in any of the four groups of sinuses: maxillary, ethmoid, frontal, or sphenoid. Sinusitis nearly always occurs in conjunction with …

Aug 13, 2024 · Sinusitis refers to inflammation of one or more of the sinuses, most often caused by infection. Sinusitis can leave you with nasal congestion, facial pain, and headaches. You may also …

Sep 10, 2025 · To appreciate sinusitis, we must first understand what the sinuses are. The human skull contains four pairs of hollow, air-filled spaces called paranasal sinuses. These are: Frontal sinuses: …