Children every now and then nosebleed a moment to stop, may be dry air, or rhinitis, sinusitis and other diseases. 1. Dry air: if the child is in the northern winter time every now and then nosebleed, it may be too dry air caused by the general need for special treatment. 2. Rhinitis: inflammation of the nasal mucosa caused by bacteria, viruses, allergens and other substances, the patient will often nosebleed, nasal congestion, nasal itching, sneezing and other symptoms. 3. Sinusitis: inflammation of the sinus mucosa caused by viruses, bacteria and other infections, patients will have repeated nosebleeds, nasal congestion, headache, mental instability and other symptoms. Children every now and then nosebleed a moment to stop, there may be other reasons (such as blood system diseases), 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.