Yellow crusts in the ears of newborns may be a normal physiological phenomenon, or it may be caused by purulent otitis media or eczema of the external auditory canal. 1. Normal physiological phenomenon: If there is too much cerumen in the ears of newborns, coupled with the environment is too hot, yellow crusts may form. 2. Suppurative otitis media: this disease is usually caused by the mucous membrane of the middle ear being infected by pathogenic bacteria, under the stimulation of pathogenic bacteria, it can lead to pus in the ear of the child, thus showing yellow crusts in the ear, and may be accompanied by earache, hearing loss and other symptoms. 3. Eczema of the external auditory canal: usually due to scratching or stimulation of the skin in the ear canal, which can lead to the appearance of more pimples and blisters on the local skin of the external auditory canal, and when the blisters burst, it may cause yellow crusts on the ears, which may be accompanied by obvious itching, pain and other symptoms. Newborns with yellow crusty ear, may also be caused by other reasons, if accompanied by obvious symptoms of discomfort, it is recommended to consult a doctor as soon as possible, after diagnosis of the cause, to give targeted treatment and conditioning.