Inflammation of one or more sinuses is called sinusitis, which involves the maxillary, septal, frontal, and pterygoid sinuses, and it is a disease that has a high incidence in the population and affects the quality of life of patients. Sinusitis can be divided into 2 types: acute and chronic sinusitis. Acute sinusitis is mostly caused by upper respiratory tract infections and can be complicated by both bacterial and viral infections. Chronic sinusitis is more common than the acute, often multiple sinuses are involved at the same time. 1, acute sinusitis Acute sinusitis is mostly caused by upper respiratory tract infections, bacterial and viral infections can be complicated at the same time. The common bacterial flora are Streptococcus pneumoniae, Streptococcus haemolyticus and Staphylococcus pyogenes, followed by Haemophilus influenzae and Cataplasma spp, the latter commonly found in children. Other pathogenic bacteria include streptococci, anaerobic bacteria and Staphylococcus aureus. Those caused by dental disease are mostly anaerobic infections, and the pus is often foul-smelling. Fungi and allergies may also be causative factors. Acute sinusitis infection often comes from: sinus-derived infection, nasal-derived infection, neighboring tissue-derived infection, blood-derived infection, trauma-derived infection, as well as systemic factors and toxic factors. 2, chronic sinusitis (1) from the acute sinusitis transformation: most of the acute sinusitis improperly treated, or not thoroughly treated so that recurrent episodes, and delayed, so that it turns into chronic. This is the primary cause of the disease. (2) obstructive causes: obstructive diseases in the nasal cavity, such as nasal polyps, turbinate hypertrophy, nasal stones, nasal septum deviation, nasal tumors, nasal cavity filling, etc. obstruct the ventilation and drainage of the nasal cavity and sinuses, which is an important cause of this disease. (3) strong virulence of pathogenic bacteria: certain virulent pathogenic bacteria, such as scarlet fever when the type B hemolytic streptococcus, its cause of acute sinusitis, very easy to turn into chronic. (4) Odontogenic infection: because the roots of the upper molars are adjacent to the bottom of the maxillary sinus, if the dental disease is not cured, it is easy to become odontogenic chronic maxillary sinusitis. (5) Trauma and foreign body: such as trauma fracture, foreign body retention or blood clot infection, resulting in chronic sinusitis. (6) Sinus anatomical factors: Due to the special or abnormal anatomical structure of each sinus, which is not conducive to ventilation and drainage, is also a non-negligible factor of its own. (7) Systemic factors: including various chronic diseases, malnutrition, low body resistance due to excessive fatigue. At the same time, there are various allergic factors and the etiology induced by bronchial dilatation.