It is clinically called cerumen embolism and is mainly caused by blockage of cerumen secreted by the cerumen glands in the external ear canal. The nature of cerumen secretion from the cerumen glands in the external ear canal varies depending on the individual’s body type. It is common to find hard, dark brown cerumen and thicker, more common crumb-like cerumen. This last does not have much effect, but thicker cerumen, if secreted vigorously, can lead to hearing loss and needs to be cleaned regularly at the hospital. The harder cerumen, which can be cleaned out only after soaking, exists inside for a long time and can cause otitis externa and even otitis media in addition to hearing loss, which is something that needs attention.