A newborn with a split below the earlobe can be due to a variety of factors, which can manifest as congenital dysplasia, acquired eczema, dry and cracked skin, and so on.
Congenital ones are less common and may manifest as a split earlobe, bifurcation, split auricle, etc., i.e., auricular hypoplasia.
Acquired ones are mostly considered to be eczema, dry skin cracks, etc. Acute eczema, etc. will lead to itching and burning sensation, which will cause infants to scratch, so that blisters will break down, and cracks can appear after repeated development, which usually need to be actively handled in order to avoid aggravation of the situation.
Newborn earlobe below the crack, there may be other reasons, it is recommended to go to the hospital in time to improve the examination to clarify the cause of the disease, under the guidance of the doctor to give targeted treatment or treatment.