There are many causes of ear canal stenosis. 1. Genetic factors, if this is the case, cannot be enlarged by themselves. 2. Ear canal stenosis if it is due to inflammation inside the ear, where the mucous membrane is congested and edema is more pronounced. If the inflammation subsides, the narrowing of the ear canal should improve, so the patient’s ear canal can be enlarged by itself. 3. If the patient has polyps or granules inside the ear, or osteoma, etc., it is often necessary to remove the masses before the patient’s ear canal narrowing can be significantly improved. It is recommended that patients with ear canal stenosis should go to the hospital for a detailed examination, and if there is no problem, there is no need to pay special attention. However, if there is inflammation or a swelling, the patient’s ear canal stenosis should improve significantly after active symptomatic treatment.