The causes of nosebleeds in children in summer usually include environmental factors or diseases such as rhinitis, which require prompt medical treatment once detected. Summer weather is usually hotter, the air will be drier, and by the environmental impact of summer sweating more, if not in time to replenish water, may lead to nasal mucosa dry, red and swollen, inadvertently rubbing the nose will lead to capillary rupture, and ultimately lead to the phenomenon of nosebleeds. In addition, if the patient himself suffers from rhinitis and other diseases, the arrival of summer, when the nasal cavity is stimulated by the external high temperature is easy to cause exacerbation of the disease, which leads to the phenomenon of nosebleeds. Nosebleeds in the summer may also have other causes, it is recommended to go to the hospital in time to improve the examination to clarify the cause of the disease, under the guidance of the doctor to give targeted treatment or treatment.