A 3-year-old child with a nosebleed should take the following measures to deal with: 1, nosebleeds should be kept in a prone position or held up so that the face down, the outflow of nosebleeds will not be sucked back into the trachea and cause asphyxiation phenomenon. 2, should be taken as far as possible to take appropriate measures to stop the bleeding treatment, at home you can pinch the root of the nose to stop the bleeding, you can also use cold water ice compresses on the bridge of the nose to stop the bleeding, and if there is a clean gauze at home, you can also stop the bleeding by filling the nostril pressure. 3, if serious, should be sent to the hospital for treatment. If you have clean gauze at home, you can also stop the bleeding by filling the nostrils with pressure. 3, if the nosebleed is serious, you should be sent to the hospital in time for treatment, and in the hospital, the emergency medicine doctor or the doctor of the Pentacameral Medicine Department can take the necessary measures to stop the bleeding treatment. In addition, the hospital should also carry out relevant examinations to identify the cause of the disease and then treat the symptoms.