Nasal phlegm sticky spit, generally refers to the nasal cavity appears sticky secretion, back to inhale spit out phlegm, may be allergic rhinitis, chronic rhinitis, chronic sinusitis and other diseases and cause. 1. Allergic rhinitis: also known as allergic rhinitis, is a kind of chronic reactive inflammation of the nasal mucosa, mainly considered to be caused by genetic, environmental factors and other common effects. It can lead to a lot of watery nasal discharge, nasal congestion, sneezing and other uncomfortable symptoms. 2. Chronic rhinitis: chronic inflammation of the nasal mucosa and submucosa, mainly characterized by swelling of the nasal mucosa, increased secretion. Therefore, chronic rhinitis can also lead to phlegm-like sticky stuff in the nasal cavity. 3. Chronic sinusitis: it is a chronic inflammatory disease that occurs in the mucous membrane of the sinuses, often combined with asthma and chronic obstructive pulmonary disease and other lower respiratory tract diseases, which can lead to nasal congestion, nasal discharge, olfactory dysfunction and headache and other uncomfortable symptoms. Because of the many causes of nasal mucus discharge, it is best to go to the hospital to complete the examination, to clarify the cause of the disease and then targeted treatment.