Sinusitis is an inflammation of the tissues in your sinuses (spaces in your forehead, cheeks and nose usually filled with air). It causes facial pain, a stuffy or runny nose, and sometimes a fever …

Acute sinus infections (symptoms lasting less than a month) are usually caused by viral upper respiratory infections (URI) and occasionally from bacterial infections.

Jun 29, 2025 · Acute sinusitis often starts as a cold, which then turns into a bacterial infection. Allergies, nasal problems, and certain diseases can also cause acute and chronic sinusitis.

Nov 22, 2025 · Learn about the causes, duration, and treatment options for sinusitis in this comprehensive guide.

Read about possible causes of lasting sinus troubles, treatments and how to prevent these problems.

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.

May 2, 2024 · Sinusitis is present when the tissue lining the sinuses become swollen or inflamed. It occurs as the result of an inflammatory reaction or an infection from a virus, bacteria, or fungus.

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.

Dec 11, 2025 · Acute sinus infections often start with allergies or a viral infection. Recurrent sinus infections occur when you have multiple sinus infections over a year. Complications of sinus …

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.