Nasal dryness with blood may be related to dry air, dry rhinitis, atrophic rhinitis and other reasons. 1. Dry air: If the air is too dry and lacks moisture, it can cause dryness of the mucous membrane in the nasal cavity, and at the same time, there may be rupture and bleeding of the submucosal capillaries. 2. Dry rhinitis: patients will feel the nasal cavity dry when breathing, and there may be symptoms such as intranasal erosion and crusting, once picking the nose and removing the intranasal crusts cause nosebleeds. 3. Atrophic rhinitis: atrophy of mucosal glands in the nasal cavity, reduced secretion, can cause nasal dryness. Due to the thinning of the nasal mucosa or nasal crusts, picking or blowing the nose can lead to capillary rupture and bleeding. If the dryness of the nasal cavity with blood, such as the persistent occurrence, it is recommended to consult a doctor in a timely manner, to clarify the cause of the disease, under the guidance of the doctor for standardized treatment.