What is Sinusitis?
Sinusitis, also called rhinosinusitis, affects about 1 in 8 adults annually and generally occurs when viruses or bacteria infect the sinuses (often during a cold) and begin to multiply. Part of the body’s reaction to the infection causes the sinus lining to swell, blocking the channels that drain the sinuses. This causes mucus and pus to fill up the nose and sinus cavities.
What is Chronic Sinusitis?
Chronic Sinusitis: Lasts for 12 weeks or longer and is usually caused by prolonged inflammation, rather than a long standing infection.
Chronic sinusitis lasts for a longer period of time than acute sinusitis and is likely caused by different things. Acute sinusitis is diagnosed when symptoms last up to 4 weeks. It is usually caused by viruses or bacteria. Chronic sinusitis is defined as lasting for 12 weeks or longer and is usually caused by prolonged inflammation, rather than a long standing infection. Infection can be a part of chronic sinusitis, especially when it worsens from time to time, but is not usually the main cause.