Sinusitis refers to the inflammation or swelling of the sinuses tissues. Under normal circumstances air fills the sinuses, but when these get filled with liquid, germs such as bacteria, fungus and virus start growing there, causing infection. Sinusitis is a pretty common condition that affects millions across the globe every year.

Sinusitis can set in due to common cold, a deviated septum, or allergic rhinitis (swelling in the nose lining).

Different types of sinusitis are as follows:
• 1. Acute sinusitis: Acute sinusitis is characterized by sudden onset of symptoms often related with cold such as a running nose and facial pain. This condition lasts for less than four weeks.
• 2. Subacute sinusitis: Inflammation of the sinuses lasting between four and eight weeks is termed as Subacute sinusitis.
• 3. Chronic sinusitis: Chronic sinusitis refers to sinusitis inflammation that lasts more than eight weeks.
• 4. Recurrent sinusitis: Sinusitis inflammation that results in several attacks every year is termed as recurrent sinusitis.