The inner wall of the ear canal hurts when you touch it, and the more common clinical disease is acute otitis externa, which is an acute inflammation of the skin of the external ear canal and the mucosal tissue under the skin. Clinical reasons, may be too strong with the viral virus bacterial invasion, the patient’s acidic environment in the ear canal is destroyed, resulting in easy reproduction of bacteria. Acute otitis externa may occur when the skin of the ear canal is broken and hollowed out. In addition, patients with diabetes are more likely to develop acute otitis externa. Clinical symptoms of the patient, is a painful sensation in the ear, the pain gradually aggravated, persistent presence. If the swelling is obvious, the patient will have hearing loss, there will be oozing fluid from the ear canal and other clinical manifestations. Clinical treatment, it is recommended to choose sensitive antibiotics for anti-inflammatory treatment. If the systemic symptoms are more serious, treatment such as intravenous fluids can be considered. In addition, sensitive antibiotic ear drops can be selected for ear drop treatment, commonly including ofloxacin ear drops, levofloxacin ear drops and so on.