Cracks at the base of the child’s ear may be caused by dry skin, or frostbite, eczema and other diseases. 1. Dry skin: the child’s ear root cracks may be due to the local skin moisture evaporation rate is faster, resulting in dry skin and caused by physiological phenomena. 2. Frostbite: the occurrence of this disease is mainly related to cold stimuli, such as prolonged exposure to cold environment after rewarming and caused by the abnormal reaction, or long-term repeated exposure to cold, wet environment, resulting in skin tissue ischemia and hypoxia caused. Frostbite occurs in the fingers, ears, tip of the nose and other places, and children with severe symptoms may have cracks at the base of the ear. 3. Eczema: the etiology of this disease is not clear, clinically believed to be related to heredity, abnormal immune mechanism, endocrine disorders, chronic infectious foci and other reasons. Eczema can be divided into various parts of the body, when it occurs in the ear, the root of the ear, behind the ear and other places of the skin will appear erythema, cracks and other symptoms, can be manifested as the root of the ear with cracks. Children with cracks at the base of the ear, 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.