Coughs and nosebleeds in children can be caused by colds, lung infections, and rhinitis. 1. Colds: viral infections caused by colds reduce the resistance of the nasal mucosa, the child may do some direct harm to the nasal mucosa of the action of the nosebleed. Virus invasion of the respiratory tract can cause inflammation, inflammation will stimulate children to cough symptoms. 2. Lung infection: children’s lung infection caused by severe coughing, if the nasal mucosa is too dry, coughing too hard, may stimulate the nasal mucosa rupture lead to nosebleeds. 3. Rhinitis: If a child’s cough is accompanied by other nasal inflammation, the inflammation stimulates the nose to itch, and the child’s frequent digging of the nose may cause injury to the nasal mucosa and nosebleeds. Children coughing and nosebleeds is the result of the two causes of the joint role or interaction, parents can take the child to the hospital, under the guidance of the doctor to correct treatment.