The concentration of hydrogen peroxide disinfectant solution can range from 3% to 25%, while only 3% hydrogen peroxide solution can be used to wash the ear. When there is inflammation or foreign matter in the ear, 3% hydrogen peroxide solution can be used to clean or disinfect and sterilize the ear. If there is inflammation in the external ear canal, cerumen or secretion in the ear canal, you can use 3% hydrogen peroxide solution to rinse it. This sterilizing solution not only rinses out pus and secretions from the external ear canal, but also acts as an antibacterial and anti-inflammatory agent. If you have any ear discomfort, you should first seek medical attention to identify the cause and follow the doctor’s instructions for treatment. The use of 3% hydrogen peroxide disinfectant solution to rinse the ear, should also follow the doctor’s instructions to regulate the use.