3 year old baby nosebleed and a few years old is not directly related to when the baby nosebleed can improve, and age has nothing to do with, mainly depends on what causes nosebleed. 3-year-old baby is often digging the nostrils leading to nasal mucous membrane damage caused by bleeding, to correct this bad habit, reduce the digging of the nostrils after the nosebleed symptoms will disappear, and do not need to wait until a few years old to get better. In addition, rhinitis, sinusitis, deviated septum and other diseases can also lead to 3-year-old baby nosebleed, can actively treat the primary disease can be improved. 3-year-old baby nosebleed may also be caused by blood system diseases, to timely blood test to see platelets, coagulation function there is no problem, after checking the targeted treatment, disease control symptoms of nosebleed will also improve. 3-year-old baby if often nosebleed to go to the hospital to check the cause of the disease, and then targeted treatment, the specific improvement time, depending on the disease. And age is not directly related.