Yellow crusts in the nose need to be considered due to nasal vestibulitis, dry rhinitis, bad habits, atrophic rhinitis and other factors. 1. Nasal vestibulitis: Nasal vestibulitis is caused by long-term chronic inflammation of the nasal cavity and sinuses, resulting in increased secretions, stimulating the nasal vestibular skin infection, thus causing yellow crusts in the nose. 2. Dry rhinitis: dry rhinitis can easily lead to nasal dryness, pain, localized yellow scabs, usually also have the phenomenon of nose blowing bleeding, the main nasal mucosa is dry, thinning has a certain relationship. 3. Bad habits: long-term finger picking the nose or will lead to local mucosal damage, such as secondary infection can cause yellow crust phenomenon. 4. Atrophic rhinitis: atrophic rhinitis can lead to nasal cavity and nasal mucosal epithelial atrophic changes, resulting in nasal mucosal glands atrophy, resulting in the internal warming of the nasal cavity, dry, secondary stinky nose bacillus infection, which is easy to cause the phenomenon of yellow crusts in the nose. There are many reasons for yellow crusts in the nose, patients should go to the hospital as soon as possible to improve the examination, a clear diagnosis.