Children’s swimming earache may be caused by cerumen embolism, acute otitis media, external auditory canal boils and other diseases. 1. Cerumen embolism: Cerumen embolism is caused by excessive cerumen secretion, obstacles to cerumen discharge, and deterioration of cerumen. When the child swims, water enters the ear canal and the cerumen expands with water, which will lead to stuffiness in the ear, tinnitus and earache. 2. Acute otitis media: Acute otitis media may be caused by pathogen infection, swimming in unclean water and other factors. If acute otitis media is induced after swimming, earache and tinnitus may occur. 3. Boils on the external auditory canal: Boils on the external auditory canal are mostly caused by Staphylococcus aureus infection, which can be triggered by unclean water flowing into the external auditory canal when the child is swimming. The child will experience earache. There may be other reasons for your child’s earache from swimming, so it is recommended to go to the hospital in time, complete the examination to clarify the cause of the disease, and then give targeted treatment or therapy under the guidance of the doctor.