Yellow fluid in children’s ears is mostly seen in oily cerumen, eczema of the external ear canal, purulent otitis media and so on. 1. Oily cerumen: some people have exuberant cerumen glands due to their physical condition, and the cerumen secreted is often dilute and yellow with oily, which is a physiological phenomenon. 2. Eczema of the external auditory canal: it is a metamorphic inflammation that occurs in the external auditory canal and auricle, with symptoms of flaking and itching, sometimes accompanied by yellow liquid exudate. 3. Suppurative otitis media: including acute and chronic suppurative otitis media, often caused by bacterial infection, which can lead to ear pain, ear overflow, tinnitus and other symptoms. Children with yellow fluid in the ear may also be caused by other reasons, it is recommended to go to the hospital in a timely manner to identify the cause of targeted treatment.