A 1-year-old baby with nosebleed should take proper measures to deal with it: 1. The baby should be kept in a prone position or held face down, so that the nosebleed can be quickly discharged from the body to avoid life threatening asphyxiation caused by the nosebleed flowing backwards into the trachea. 2. There are many reasons for nosebleeds in 1 year old babies, the most common reasons are cold and infection, abnormal nasal development, vascular malformation, etc. A few nosebleeds may also be caused by diseases of the blood system, which can be treated in the hospital through careful examination.