The cause of
1, body resistance is reduced, such as excessive fatigue, catch cold catch cold is wet, malnutrition, vitamin deficiencies, and improper living environment.
2, allergic constitution, systemic diseases such as anemia, lack of endocrine function (such as decreased function of thyroid gland and the pituitary gland and the gonads), acute infectious diseases such as influenza, measles, scarlet fever, diphtheria, the disease can be induced.
3, nasal cavity of some diseases, such as the deflection of nasal septum, middle turbinate hypertrophy, nasal polyps, allergic rhinitis, nasal foreign body, or nasal tumors, also can cause sinusitis.
4, tonsillitis or adenoid hypertrophy, maxillary second pair fangs and first and second molar root infection, when tooth damage or maxillary sinus wall cavities residual roots falling within the maxillary sinus, etc. Can also lead to sinusitis.
5, and other such as sinus traumatic fracture. When swimming diving posture, such as vertical diving), improper or blow your nose after diving and swimming, sewage into the sinuses; Stuffing inside nasal cavity encumbrances time is too long; High-flying drops rapidly, sinus cavity formed relatively negative pressure with the outside world, such as nasal secretions inhaled sinus can also cause a disease.