Generally speaking, it is caused by the dryness and erosion of the nasal mucosa, and there is another condition because the nasal cavity is stimulated by chronic inflammation and the brittleness of the blood vessels under the mucosa increases, which can easily lead to damage to the local mucosa when rubbing the nose or digging the nostrils, causing nosebleeds. A clean cotton ball can be inserted into the bleeding nasal cavity to achieve the effect of pressure to stop the bleeding. During this period, avoid strenuous exercise, do not smoke, drink alcohol, etc. The nasal cavity can be improved by using peppermint paraffin oil drops and nasal rinsing with saline or physiological seawater to improve the state of the nasal mucosa.