The so-called yellow boogers in the nose all the time, which means that there are more yellow secretions in the nasal cavity, especially the yellow dry crust-like secretions. In clinical terms, it is mostly seen in the following cases: 1. Chronic nasal vestibulitis, which is also the most common one. Most of them are individuals who damage the mucosa of the nasal vestibule and nasal cavity because of frequent nose picking and digging, forming a chronic recurrent exudation, dryness, crusting, and even pain and blood under the scabs. The history of the disease will be repeated and prolonged. 2, nasal vestibular eczema. It is a kind of metaplastic lesion in the nasal vestibule, with yellow crusty discharge, local itching, redness and swelling. 3, nasal foreign body with infection. Especially in children whose foreign body history is not clear, secondary infection occurs over time.