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  1. Sinus Infection (Sinusitis): Causes, Symptoms & Treatment

    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 …

  2. Sinus Infection: Symptoms, Causes, and Treatment - Healthline

    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.

  3. Sinus infection: 11 symptoms and treatments - Medical News Today

    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.

  4. Chronic sinusitis - Symptoms and causes - Mayo Clinic

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

  5. How to get rid of a sinus headache - Harvard Health

    Jul 17, 2024 · Discover effective strategies to relieve a sinus headache. Learn about home remedies and treatments that relieve sinus pressure and reduce sinus inflammation.

  6. Sinus Infection (Sinusitis): Symptoms, Causes, Duration, and ...

    Nov 22, 2025 · Sinusitis, also known as a sinus infection, can cause symptoms such as facial pain, congestion, and headache. Learn about the causes, duration, and treatment options for sinusitis in …

  7. Sinusitis - Wikipedia

    Sinusitis, also known as rhinosinusitis and commonly known as a sinus infection, is an inflammation of the mucous membranes that line the sinuses resulting in symptoms that may include production of …

  8. Sinus Infection Basics | Sinus Infection | CDC

    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.

  9. Sinusitis - Boston Children's Hospital

    Sinusitis is an infection of the sinuses near the nose. The sinuses are cavities or air-filled pockets near the nasal passage. Like the nasal passage, the sinuses are lined with mucous membranes. There …

  10. Sinus Infections and What Causes Them - Verywell Health

    Apr 6, 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.