The yellow stuff flowing inside the baby’s ear may be caused by otitis externa, otitis media, eczema and other diseases. 1. Otitis externa: Otitis externa is an infectious disease that may be caused by pathogens directly attacking the organism, or may be triggered by factors such as high temperature and damage to the external ear canal. Children with otitis may have increased secretion from the ear canal, which may appear as purulent secretion, and is accompanied by pain, swelling of the ear canal and other symptoms, manifested as yellow stuff flowing from the ear. 2. Otitis media: Otitis media is mostly caused by pathogen infection, Eustachian tube dysfunction, and improper breastfeeding position of infants. Children with otitis media may have water or pus flowing from the ear canal, which is manifested as yellow stuff flowing from the ear, accompanied by tinnitus, earache and other symptoms. 3. Eczema: The cause of eczema is not yet clear, and it may be caused by heredity, low immunity and other factors. If eczema appears in the ear area, it can be manifested as pustules, blisters, pimples, etc. When the blisters rupture, the situation of yellow stuff flowing from the ear can occur. There are many causes of yellow stuff coming out of baby’s ears, it is recommended to find out the cause in time.