Greasy ears may be caused by genetic factors, exuberant sebaceous gland secretion, purulent otitis media and other factors. 1. Genetic factors: Some people will have cerumen secretion with high oily content due to genetic factors, which often leads to cerumen embolism due to lack of proper treatment. 2. Excessive sebaceous gland secretion: prolonged staying up late and irregular diet may lead to endocrine imbalance, which will increase the secretion of sebaceous glands, and then lead to greasy ears. 3. Suppurative otitis media: usually associated with infectious factors, when there is a suppurative infection, can lead to the presence of pus in the ear, which will make the ear greasy, may also be accompanied by ear pain, tinnitus, vertigo, and in severe cases will lead to hearing loss. Oily ears, along with other symptoms of discomfort, should be alerted to disease factors, and medical examination and treatment are recommended.