Baby cold, cough, nosebleed is due to the cold virus invasion into the baby’s body, so that the mucous membrane of the nasal cavity congestion, edema, and even the mucous membrane appears to be broken, the mucous membrane of the capillary rupture and the appearance of nosebleed. There is also a situation due to fever, the body’s water evaporation is too much, itself relatively dry mucous membrane more dry, easy to rupture, bleeding. It is recommended that erythromycin ointment can be used to apply to the nasal cavity, both anti-inflammatory, but also to the nasal mucosa can play a role in moisturizing, preventing dry burst. Another relatively rare cause may be combined with hematologic disorders, such as coagulation disorders, leukemia, etc., need to check the blood routine, if necessary, do the bone marrow examination, in order to exclude these diseases.