Sinusitis is usually caused by inflammation of the nose after the human body has caught a cold. The human body contains several sinuses, and the inflammation does not disappear in time because of the opening. Sinusitis is triggered by a decrease in systemic resistance, such as overexertion, cold, malnutrition, vitamin deficiency and so on. Certain living environments can also be triggering factors, such as a high level of dust in the air, which causes nasal allergies after inhalation. In addition, there are systemic diseases, such as anemia, influenza, measles, diphtheria, etc., which can trigger the occurrence of this disease. There is also nasal septum curvature, which is a physiological problem, as well as rhinitis, nasal polyps, nasal foreign bodies, etc. can cause the occurrence of sinusitis.