What Are the Causes of Sinus Infection?
According to the Mayo Clinic, sinus infections occur when the sinus cavity becomes inflamed and swollen due to irritation. The irritation usually results from allergies, the common cold, nasal polyps or a deviated septum. Sinus infections are categorized into three types of infection: viral, bacterial or fungal. The most common sinus infection is the result of a virus (the common cold), followed by a bacterial infection, while a fungal infection proves rare and uncommon. Knowing the cause of the sinusitis will help you treat the systems appropriately.
