Sinusitis also known as a sinus infection (sozzaish/سوزش) is an inflammation or swelling of the sinus tissues that affect the nose, head, and mouth. Initially, sinuses are formed of air-filled bubbles but they become blocked with infectious bacterial fluid that grows and causes infection.

Sinus blockage is caused by these conditions:

• Common cold
• Allergic rhinitis, swelling of the nose lining caused by allergens
• Nasal polyps-small growths appear in the nose lining
• A deviated septum- It is the nasal cavity lining that blocks bacterial microbes