When using cotton swabs to clean the external ear canal of children, if bleeding occurs, you need to be alert to mucosal injury, coagulation disorders and other diseases, and it is recommended to go to the hospital. The external auditory canal is self-cleaning and usually does not need to be cleaned on a regular basis. If you use cotton swabs to clean the external auditory canal, you may bruise the epithelium of the canal and cause bleeding, or you may insert the swab too deeply and break the tympanic membrane, causing bleeding. It is recommended to send the child to the doctor for diagnosis of the cause of bleeding. If the bleeding is caused by damage to the skin of the external auditory canal, it can be stopped by local debridement and disinfection, and usually heals on its own; if the tympanic membrane is damaged, surgical repair may be required. In addition, if the bleeding persists, it is necessary to investigate the presence of coagulation disorders, such as thrombocytopenia and hemophilia. Therefore, it is recommended that bleeding from the external auditory canal be treated in a hospital.