Children often sneezing nosebleed may be due to the nasal cavity is too dry caused by physiological phenomena, may also be due to allergic rhinitis and so on. 1. Physiological phenomenon: when the weather is hot, the air is too dry and the patient’s supplemental water is insufficient at this time, the mucous membrane of the nasal cavity will be in a long-term dry environment. In turn, the mucous membrane in the nasal cavity becomes dry and fragile, which stimulates the patient’s nasal itching and sneezing symptoms, and the small blood vessels under the mucous membrane may rupture and bleed when sneezing hard. 2. Allergic rhinitis: In allergic rhinitis, the stimulation of inflammatory factors and allergens in the nasal mucosa will lead to sneezing and itching symptoms. After the itchy nose, the child will habitually rub and pick the nose, which may easily damage the nasal mucosa in the long run, thus causing the symptoms of nose bleeding. Therefore, allergic rhinitis is easy to trigger patients sneezing and nosebleed. Children often sneeze and nosebleed, there may be other reasons, it is recommended to go to the hospital in a timely manner, improve the examination to clarify the cause of the disease, under the guidance of the doctor to give targeted treatment or treatment.