1, the whole body resistance to reduce: such as over fatigue; cold; moisture; malnutrition; vitamin deficiency and poor living environment caused. This is a cause of sinusitis is easily ignored.
2, allergic body systemic diseases: such as anemia; endocrine insufficiency (such as hypothyroidism pituitary gland and gonads); acute infectious diseases such as influenza; measles; scarlet fever; diphtheria, etc. can induce sinusitis to occur.
3, nasal cavity diseases: such as nasal septal deviation; middle turbinate hypertrophy; nasal polyps; allergic rhinitis; nasal foreign body or nasal tumor can also cause sinusitis.
4, adjacent lesions: such as tonsillitis or adenoid hypertrophy; infection of the roots of the maxillary bicuspids and first molars; tooth extraction injury to the upper jaw; sinus wall or caries stumps fall into; maxillary sinus can also lead to sinusitis.
5, other: such as sinus trauma fracture, swimming diving posture improper (such as taking vertical diving) or diving and swimming after blowing the nose improperly; sewage into the sinuses; nasal cavity filler stay too long; high altitude flight quickly fall sinus cavity and the outside world to form a relative negative pressure; nasal secretions into the sinuses can also cause the onset.
In addition to the above causes of sinusitis, allergic reactions, mechanical obstruction and changes in air pressure can easily induce sinusitis, and infection of the teeth can cause odontogenic maxillary sinusitis.