Chronic sinusitis is difficult to treat, mainly because the patient inside the sinus cavity drainage is not smooth, environmental factors, genetic factors, immune factors. 1. Poor drainage inside the sinus cavity: If chronic sinusitis is caused by sinus blockage, there are generally nasal obstruction factors and sinus anatomical factors, you can first choose nasal spray hormonal drugs for conservative treatment, such as budesonide nasal spray. Mucus promoters such as eucalyptus-pinocampus enteric softgels. If the effect of conservative treatment is not good, you can also choose nasal endoscopy technology, through surgical treatment to improve the disease. 2. Environmental factors: some patients are caused by environmental allergies. In real life, many allergic factors can not be completely removed, such as pollen, dust, dust mites, etc., which can easily cause recurrent allergic rhinitis. 3. Genetic factors: such as primary ciliary dyskinesia is an autosomal genetic disease, often accompanied by chronic sinusitis. Chronic sinusitis has the tendency of family aggregation. 4. Immune factors: physical weakness and immunodeficiency are susceptibility factors for chronic sinusitis, leading to recurrent symptoms such as runny nose and nasal congestion. Therefore, chronic sinusitis is not easy to cure and is prone to recurrence. For chronic sinusitis, it is recommended to consult hospitals for standardized treatment.