Baby blowing air conditioning nosebleed causes more, there may be nasal mucosal damage, coagulation dysfunction, hematopoietic system abnormalities and other diseases, need to be treated according to the cause. 1. Nasal mucous membrane damage: if you consider the air conditioning room air dry and lead to nasal mucous membrane damage, can be given to the nasal filling to stop bleeding, at the same time to be cod liver oil moist nasal cavity. 2. Coagulation dysfunction: if the baby has had many nosebleeds in the past, and there are ecchymosis and petechiae on the skin, it is necessary to be alert to whether there are liver diseases, hemophilia and other coagulation dysfunctions. 3. Hematopoietic system abnormality: if the baby at the same time there is fever, pale yellow, bleeding gums and other manifestations, need to be alert to whether there is aplastic anemia, leukemia and other hematopoietic system diseases. Baby blowing air conditioning nosebleed causes more, such as sinusitis, acute rhinitis and other diseases can lead to similar symptoms, if the baby blowing air conditioning nosebleed, need to improve the nasopharyngoscopy, clear cause, and actively cooperate with the treatment.