Boogers are solid substances formed after nasal secretions have dried and crusted. The physiological factors are usually related to the environment and occupation, while the pathological factors may be caused by inflammation, nasal septum deviation, nasal polyps, etc. I. Physiological factors: 1. Environment: As the nasal cavity is sensitive to the external environment, when the environment is polluted, the nasal cavity will purify the air inhaled into the body by secreting more mucus and the swinging of the nasal hairs, which will then be manifested as nasal stools, it is recommended to wear a mask when going out to reduce the impurities in the air into the nasal cavity as much as possible; 2. Occupation-related: Such as teachers inhaling chalk fumes for a long time It is easy to stimulate the nasal cavity, resulting in increased secretion of nasal mucus, thus manifesting as more nasal stools. You can use a damp rag to wipe the blackboard or use modern teaching equipment, such as projectors, instead. Second, pathological factors: 1, inflammation: such as upper respiratory tract infection, rhinitis, sinusitis and other factors leading to the invasion of the nasal cavity by inflammatory substances, stimulating the nasal mucosa leading to increased secretions, pus snot, which is not cleaned and dried in time to form boogers. Antibiotics such as cefaclor and amoxicillin can be used, combined with nasal sprays such as mometasone furoate nasal spray for treatment; 2. Deviated nasal septum: If deviated nasal septum leads to dry crusting in the nasal cavity, affecting the normal ventilation function, it will also stimulate the gathering of nasal mucosal secretions, leading to more nasal stools, which may also be accompanied by headache, nasal congestion, nasal discharge with blood, etc. At this time, you should seek medical advice and clear diagnosis through CT examination 3. Nasal polyps: nasal congestion and increased nasal discharge may occur, and some nasal discharge may not be easily discharged due to polyps blockage, which may solidify into boogers for a long time. It is recommended to visit the hospital and remove the polyps if necessary.