Sinus Infection (Sinusitis): Causes, Symptoms & Treatment

Sinusitis is an inflammation of the tissues in your sinuses. It’s usually caused by viruses, but can also be caused by bacteria or allergies.

Symptoms of sinusitis (sinus infection)

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Sinus infection: 11 symptoms and treatments

Sinusitis (Sinus Infection) - Symptoms & Causes

Sinusitis: Causes & Symptoms

Sinus Infection (Sinusitis or Rhinosinusitis) > Fact Sheets > Yale Medicine

Sinus infections: Causes, symptoms and treatment

Sinus Infection (Sinusitis): Signs and Symptoms

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