Cracks on the ears may be caused by ear trauma, external ear eczema, frostbite and other factors, the patient should consult a doctor in a timely manner to clarify the cause of the disease and then carry out appropriate treatment. 1. Trauma: If you have had a collision or a fall before the occurrence of a crack in the ear, you should consider that it is caused by trauma, and this group of people should treat the wound in a timely manner. 2. Eczema of the outer ear: chronic eczema in addition to itching, thickening of the skin of the outer ear, epidermal flaking, cracking, crusting. 10%-15% silver nitrate can be used to rub; interictal period, 70% ethanol solution can be used to clean the external ear canal. 3. Frostbite: If there is a crack in the ear in winter and a history of previous illnesses, it should be considered frostbite caused by frostbite, the patient will also have frostbite parts of the red, purple, swelling, such people should do a good job of daily warmth. Cracks on the ears, it is recommended that the hospital visit, diagnosis and treatment.