What is sinusitis?
Acute bacterial sinusitis is an infection of the sinus cavities caused by bacteria. It usually is preceded by a cold, allergy attack, or irritation by environmental pollutants. Unlike a cold, or allergy, bacterial sinusitis requires a physician’s diagnosis and treatment with an antibiotic to cure the infection and prevent future complications.
Normally, mucus collecting in the sinuses drains into the nasal passages. When you have a cold or allergy attack, your sinuses become inflamed and are unable to drain. This can lead to congestion and infection. Your doctor will diagnosis acute sinusitis if you have up to 4 weeks of purulent nasal drainage accompanied by nasal obstruction, facial pain-pressure-fullness, or both. The sinus infection is likely bacterial if it persists for 10 days or longer, or if the symptoms worsen after an initial improvement.