Sudden bleeding from the ear without pain or itching is mainly seen clinically in the following cases: In the first case, some patients repeatedly pull out their ears for a long time, resulting in thinning of the skin of the ear canal wall and the possibility of chronic damage to the blood vessels under the skin during the pulling out process, leading to sudden local bleeding. In the second case, some patients have external ear canal granulation or external ear canal cancer, middle ear cancer, etc., and the local breakage and erosion of the swelling can cause sudden bleeding from the ear. Patients mostly have a sense of blockage in the ear canal, hearing loss and other related discomfort, which is very easy to diagnose clinically by doing CT examination. In the third case, there are patients with tympanic membrane rupture and bleeding caused by trauma to the eardrum, which may not have a large perforation and may manifest as a blood clot in the ear canal and other related manifestations. In the fourth case, some patients have nasopharyngeal carcinoma, and chronic damage to the skin of the ear canal wall caused by radiotherapy or chemotherapy treatment can result in bleeding from the skin of the ear canal wall. In the fifth case, some patients have acute suppurative otitis media with sudden rupture and perforation of the eardrum at an early stage, which may result in bleeding from the ear, accompanied by a large amount of purulent discharge from the ear canal.