Yellow water from the baby’s ear is often seen in otitis externa and otitis media, otitis externa is mostly caused by bathing in the external auditory canal into the unclean fluid or repeated ear digging, which can be manifested as itching and pain in the external auditory canal, and pus secretion can be seen in the external auditory canal, the external auditory canal can be congested and swollen, and the tympanic membrane can be congested but intact, whereas otitis media is mostly caused by upper respiratory infections, and the inflammation can arrive at the tympanic chamber via the Eustachian tube and cause inflammation within the chamber of the tympanic membrane. Inflammation can reach the tympanic cavity through the Eustachian tube, causing inflammation within the tympanic cavity and perforation of the tympanic membrane. Both treatments are basically the same, need to use 3% hydrogen peroxide to clean the external auditory canal, and then use levofloxacin ear drops, at the same time can be oral antibiotics, such as cefprozil, hormones, such as prednisone, etc., the course of treatment is generally 1 week.