Nostril pain with crusting is considered to be related to environmental dryness, nasal vestibulitis and dry rhinitis. 1. Environmental dryness: if the patient stays in an excessively dry environment for a long time, the nasal mucosa may become ischemic, which may lead to the phenomenon of nostril pain with scabs. 2. Nasal vestibulitis: due to repeated stimulation of nasal secretions in the nasal vestibule, leading to pain in the nasal vestibule, local skin redness, swelling, tenderness and other symptoms, serious skin erosion or cracking, with thin crusts on the surface. 3. Dry rhinitis: in dry weather, the mucus secreted by the nasal cavity with the evaporation of air will appear dry scabs, will produce stimulation of the mucous membrane, thus appearing nostril pain with the symptom of scabs. It is recommended that patients can keep the indoor air moist and drink more water, if the symptoms are not relieved, go to the hospital in time for examination and treatment according to the cause.