• Sinusitis - Causes
• Highlights
• Introduction
• Risk Factors
• Complications
• Symptoms
• Diagnosis

Causes

Bacteria are the most common direct cause of acute sinusitis. (Other organisms might be the infecting cause in less common cases.) The ability of bacteria or other organisms to infect the sinuses, however, must first be set up by conditions that create a favorable environment in the sinus cavities. Sinusitis is most often an acute condition, which is self-limiting and treatable. In some cases, however, the inflammation in the sinuses is lasting, or is chronic to begin with. The causes for...