Tinnitus in 3-year-old babies is mostly caused by the presence of foreign bodies in the ear or inflammation of the ear canal. 1. The presence of foreign bodies in the ear, if the child has a foreign body in the ear canal or cerumen, if not removed in a timely manner, it will cause tinnitus, and it is not recommended to remove it by yourself, if not under the guidance of a professional physician, it will lead to damage to the ear canal due to blunt separation. 2. Inflammation of the ear canal, if the child suffers from acute otitis media, secretory otitis media and other diseases, therefore, such as the child’s recent history of upper respiratory tract infections, we need to be vigilant about the inflammation of the ear canal, in addition to the tinnitus, may cause sneezing, ear canal pus, coughing and coughing and other symptoms. 3-year-old baby tinnitus may also have other causes, it is recommended to go to the hospital in a timely manner, improve the examination to clarify the cause of the disease, under the guidance of the doctor to give targeted treatment or treatment.