Complications

Acute sinusitis complications are uncommon, and serious complications are rare. If they occur, complications might include:

• Chronic sinusitis. Acute sinusitis may be a flare-up of a long-term problem known as chronic sinusitis. Chronic sinusitis lasts longer than 12 weeks.
• Meningitis. This infection causes inflammation of the membranes and fluid surrounding your brain and spinal cord.
• Other infections. Uncommonly, an infection can spread to the bones (osteomyelitis) or skin (cellulitis).
• Vision problems. If the infection spreads to your eye socket, it can cause reduced vision or even blindness that can be permanent.